| Scientific Name (Synonyms are indented) |
Common Name |
| Packera A. Löve & D. Löve |
ragwort |
| Packera cana (Hook.) W.A. Weber & A. Löve |
woolly groundsel |
| Senecio canus Hook. |
|
| Senecio convallium Greenm. |
|
| Senecio hallii Britton |
|
| Senecio hallii Britton var. discoidea W.A. Weber |
|
| Senecio harbourii Rydb. |
|
| Senecio howellii Greene |
|
| Senecio purshianus Nutt. |
|
| Packera dimorphophylla (Greene) W.A. Weber & A. Löve |
splitleaf groundsel |
| Packera dimorphophylla (Greene) W.A. Weber & A. Löve var. paysonii (T.M. Barkley) D.K. Trock & T.M. Barkley |
Payson's groundsel |
| Senecio dimorphophyllus Greene var. paysonii T.M. Barkley |
|
| Packera eurycephala (Torr. & A. Gray) W.A. Weber & A. Löve |
widehead groundsel |
| Packera eurycephala (Torr. & A. Gray) W.A. Weber & A. Löve var. eurycephala |
widehead groundsel |
| Senecio eurycephalus Torr. & A. Gray |
|
| Packera multilobata (Torr. & A. Gray ex A. Gray) W.A. Weber & A. Löve |
lobeleaf groundsel |
| Senecio lynceus Greene |
|
| Senecio lynceus Greene var. leucoreus (Greenm.) S.F. Blake |
|
| Senecio multilobatus Torr. & A. Gray ex A. Gray |
|
| Senecio stygius Greene |
|
| Senecio thornberi Greenm. |
|
| Senecio uintahensis (A. Nelson) Greenm. |
|
| Packera pauciflora (Pursh) A. Löve & D. Löve |
alpine groundsel |
| Senecio discoideus (Hook.) Britton |
|
| Senecio pauciflorus Pursh |
|
| Packera pseudaurea (Rydb.) W.A. Weber & A. Löve |
falsegold groundsel |
| Packera pseudaurea (Rydb.) W.A. Weber & A. Löve var. pseudaurea |
falsegold groundsel |
| Senecio pauciflorus Pursh var. jucundulus Jeps. |
|
| Senecio pseudaureus Rydb. |
|
| Packera streptanthifolia (Greene) W.A. Weber & A. Löve |
Rocky Mountain groundsel |
| Packera cymbalarioides (Nutt.) W.A. Weber & A. Löve, nom. illeg. |
|
| Packera oodes (Rydb.) W.A. Weber |
|
| Packera streptanthifolia (Greene) W.A. Weber & A. Löve var. rubricaulis (Greene) Dorn |
|
| Packera streptanthifolia (Greene) W.A. Weber & A. Löve var. streptanthifolia |
|
| Senecio acutidens Rydb. |
|
| Senecio adamsii Howell |
|
| Senecio aureus L. var. borealis Torr. & A. Gray |
|
| Senecio cymbalarioides Nutt., nom. illeg., non Senecio cymbalarioides H. Buek |
|
| Senecio cymbalarioides Nutt. var. borealis (Torr. & A. Gray) Greenm. |
|
| Senecio cymbalarioides Nutt. var. suksdorfii (Greenm.) M. Peck |
|
| Senecio fulgens Rydb. |
|
| Senecio jonesii Rydb. |
|
| Senecio laetiflorus Greene |
|
| Senecio leonardii Rydb. |
|
| Senecio longipetiolatus Rydb. |
|
| Senecio oodes Rydb. |
|
| Senecio pammelii Greenm. |
|
| Senecio platylobus Rydb. |
|
| Senecio rubricaulis Greene |
|
| Senecio streptanthifolius Greene |
|
| Senecio streptanthifolius Greene var. borealis (Torr. & A. Gray) J.F. Bain |
|
| Senecio streptanthifolius Greene var. kluanei J.F. Bain |
|
| Senecio streptanthifolius Greene var. laetiflorus (Greene) J.F. Bain |
|
| Senecio streptanthifolius Greene var. oodes (Rydb.) J.F. Bain |
|
| Senecio streptanthifolius Greene var. rubricaulis (Greene) J.F. Bain |
|
| Senecio streptanthifolius Greene var. wallowensis J.F. Bain |
|
| Senecio subcuneatus Rydb. |
|
| Senecio suksdorfii Greenm. |
|
| Senecio wardii Greene |
|
| Packera werneriifolia (A. Gray) W.A. Weber & A. Löve |
hoary groundsel |
| Packera werneriifolia (A. Gray) W.A. Weber & A. Löve var. alpina (A. Gray) Dorn |
|
| Senecio aureus L. var. werneriifolius A. Gray |
|
| Senecio molinarius Greenm. |
|
| Senecio muirii Greenm. |
|
| Senecio saxosus Klatt |
|
| Senecio saxosus Klatt var. toiyabensis Greenm. |
|
| Senecio werneriifolius (A. Gray) A. Gray |
|
| Senecio werneriifolius (A. Gray) A. Gray var. alpinus (A. Gray) Dorn |
|
| Senecio werneriifolius (A. Gray) A. Gray var. incertus Greenm. |
|
| Paeonia L. |
peony |
| Paeonia brownii Douglas ex Hook. |
Brown's peony |
| Palafoxia Lag. |
palafox |
| Palafoxia arida B.L. Turner & Morris |
desert palafox |
| Palafoxia arida B.L. Turner & Morris var. arida |
desert palafox |
| Panicum L. |
panicgrass |
| Panicum capillare L. |
witchgrass |
| Panicum barbipulvinatum Nash |
|
| Panicum capillare L. ssp. barbipulvinatum (Nash) Tzvelev |
|
| Panicum capillare L. var. agreste Gattinger |
|
| Panicum capillare L. var. barbipulvinatum (Nash) R.L. McGregor |
|
| Panicum capillare L. var. brevifolium Vasey ex Rydb. & Shear |
|
| Panicum capillare L. var. occidentale Rydb. |
|
| Panicum dichotomiflorum Michx. |
fall panicgrass |
| Panicum dichotomiflorum Michx. var. dichotomiflorum |
fall panicgrass |
| Panicum dichotomiflorum Michx. var. geniculatum (Alph. Wood) Fernald |
|
| Panicum hirticaule J. Presl |
Mexican panicgrass |
| Panicum hirticaule J. Presl var. hirticaule |
Mexican panicgrass |
| Panicum capillare L. var. hirticaule (J. Presl) Gould |
|
| Panicum capillare L. var. miliaceum (Vasey) Gould |
|
| Panicum capillare L. var. pampinosum (Hitchc. & Chase) Gould |
|
| Panicum hirticaule J. Presl var. miliaceum (Vasey) Beetle |
|
| Panicum hirticaule J. Presl var. pampinosum (Hitchc. & Chase) Beetle |
|
| Panicum pampinosum Hitchc. & Chase |
|
| Panicum sonorum Beal |
|
| Panicum miliaceum L. |
broomcorn millet |
| Panicum miliaceum L. ssp. miliaceum |
broomcorn millet |
| Panicum virgatum L. |
switchgrass |
| Panicum virgatum L. var. virgatum |
switchgrass |
| Panicum virgatum L. var. cubense Griseb. |
|
| Panicum virgatum L. var. obtusum Alph. Wood |
|
| Parietaria L. |
pellitory |
| Parietaria hespera Hinton |
rillita pellitory |
| Parietaria hespera Hinton var. hespera |
rillita pellitory |
| Parietaria pensylvanica Muhl. ex Willd. |
Pennsylvania pellitory |
| Parietaria obtusa Rydb. ex Small |
|
| Parietaria occidentalis Rydb. |
|
| Parietaria pensylvanica Muhl. ex Willd. var. obtusa (Rydb. ex Small) Shinners |
|
| Parkinsonia L. |
paloverde |
| Parkinsonia aculeata L. |
Jerusalem thorn |
| Parkinsonia florida (Benth. ex A. Gray) S. Watson |
blue paloverde |
| Cercidium floridum Benth. ex A. Gray |
|
| Cercidium floridum Benth. ex A. Gray ssp. floridum |
|
| Parnassia L. |
grass of Parnassus |
| Parnassia californica (A. Gray) Greene |
California grass of Parnassus |
| Parnassia palustris L. var. californica A. Gray |
|
| Parnassia fimbriata K.D. Koenig |
fringed grass of Parnassus |
| Parnassia fimbriata K.D. Koenig var. fimbriata |
fringed grass of Parnassus |
| Parnassia fimbriata K.D. Koenig var. intermedia (Rydb.) C.L. Hitchc. |
fringed grass of Parnassus |
| Parnassia cirrata Piper var. intermedia (Rydb.) P.K. Holmgren & N.H. Holmgren |
|
| Parnassia intermedia Rydb. |
|
| Parnassia kotzebuei Cham. ex Spreng. |
Kotzebue's grass of Parnassus |
| Parnassia kotzebuei Cham. ex Spreng. var. pumila C.L. Hitchc. & Ownbey |
|
| Parnassia palustris L. |
marsh grass of Parnassus |
| Parnassia palustris L. var. montanensis (Fernald & Rydb. ex Rydb.) C.L. Hitchc. |
mountain grass of Parnassus |
| Parnassia montanensis Fernald & Rydb. ex Rydb. |
|
| Paronychia Mill. |
nailwort |
| Paronychia sessiliflora Nutt. |
creeping nailwort |
| Parthenium L. |
feverfew |
| Parthenium incanum Kunth |
mariola |
| Parthenocissus Planch. |
creeper |
| Parthenocissus vitacea (Knerr) Hitchc. |
woodbine |
| Pascopyrum A. Löve |
wheatgrass |
| Pascopyrum smithii (Rydb.) A. Löve |
western wheatgrass |
| Agropyron molle (Scribn. & J.G. Sm.) Rydb. |
|
| Agropyron smithii Rydb. |
|
| Agropyron smithii Rydb. var. molle (Scribn. & J.G. Sm.) M.E. Jones |
|
| Agropyron smithii Rydb. var. palmeri (Scribn. & J.G. Sm.) A. Heller |
|
| Elymus smithii (Rydb.) Gould |
|
| Elytrigia smithii (Rydb.) Nevski |
|
| Elytrigia smithii (Rydb.) Nevski var. mollis (Scribn. & J.G. Sm.) Beetle |
|
| Paspalum L. |
crowngrass |
| Paspalum distichum L. |
knotgrass |
| Digitaria paspaloides Michx. |
|
| Paspalum distichum L. var. indutum Shinners |
|
| Paspalum paspaloides (Michx.) Scribn. |
|
| Pastinaca L. |
parsnip |
| Pastinaca sativa L. |
wild parsnip |
| Pastinaca sativa L. var. pratensis Pers. |
|
| Pectis L. |
chinchweed |
| Pectis papposa Harv. & A. Gray |
manybristle chinchweed |
| Pectis papposa Harv. & A. Gray var. papposa |
manybristle chinchweed |
| Pectocarya DC. ex Meisn. |
combseed |
| Pectocarya heterocarpa (I.M. Johnst.) I.M. Johnst. |
chuckwalla combseed |
| Pectocarya penicillata (Hook. & Arn.) A. DC. var. heterocarpa I.M. Johnst. |
|
| Pectocarya penicillata (Hook. & Arn.) A. DC. |
sleeping combseed |
| Cynoglossum penicillatum Hook. & Arn. |
|
| Pectocarya linearis (Ruiz & Pav.) DC. var. penicillata (Hook. & Arn.) M.E. Jones |
|
| Pectocarya platycarpa (Munz & I.M. Johnst.) Munz & I.M. Johnst. |
broadfruit combseed |
| Pectocarya gracilis I.M. Johnst. var. platycarpa Munz & I.M. Johnst. |
|
| Pectocarya linearis (Ruiz & Pav.) DC. var. platycarpa (Munz & I.M. Johnst.) Cronquist |
|
| Pectocarya recurvata I.M. Johnst. |
curvenut combseed |
| Pectocarya setosa A. Gray |
moth combseed |
| Pedicularis L. |
lousewort |
| Pedicularis attollens A. Gray |
little elephantshead |
| Pedicularis attollens A. Gray ssp. attollens |
little elephantshead |
| Elephantella attollens (A. Gray) A. Heller |
|
| Pedicularis concinna Eastw. |
|
| Pedicularis centranthera A. Gray |
dwarf lousewort |
| Pedicularis centranthera A. Gray var. exulans M. Peck |
|
| Pedicularis crenulata Benth. |
meadow lousewort |
| Pedicularis albomarginata M.E. Jones |
|
| Pedicularis groenlandica Retz. |
elephanthead lousewort |
| Elephantella groenlandica (Retz.) Rydb. |
|
| Pedicularis groenlandica Retz. ssp. surrecta (Benth.) Piper |
|
| Pedicularis groenlandica Retz. var. surrecta (Benth.) A. Gray |
|
| Pedicularis semibarbata A. Gray |
pinewoods lousewort |
| Pedicularis semibarbata A. Gray var. charlestonensis Pennell & Clokey |
Charleston lousewort |
| Pedicularis semibarbata A. Gray ssp. charlestonensis (Pennell & Clokey) Clokey |
|
| Pedicularis semibarbata A. Gray var. semibarbata |
pinewoods lousewort |
| Pediocactus Britton & Rose |
pincushion cactus |
| Pediocactus simpsonii (Engelm.) Britton & Rose |
mountain ball cactus |
| Pediocactus simpsonii (Engelm.) Britton & Rose var. robustior (J.M. Coult.) L.D. Benson |
mountain ball cactus |
| Echinocactus simpsonii Engelm. var. robustior J.M. Coult. |
|
| Pediocactus simpsonii (Engelm.) Britton & Rose var. simpsonii |
mountain ball cactus |
| Echinocactus simpsonii Engelm. |
|
| Pediomelum Rydb. |
Indian breadroot |
| Pediomelum castoreum (S. Watson) Rydb. |
beaver Indian breadroot |
| Psoralea castorea S. Watson |
|
| Pediomelum megalanthum (Woot. & Standl.) Rydb. |
Intermountain Indian breadroot |
| Pediomelum megalanthum (Woot. & Standl.) Rydb. var. retrorsum (Rydb.) J. Grimes |
Intermountain Indian breadroot |
| Psoralea mephitica S. Watson var. retrorsa (Rydb.) Kearney & Peebles |
|
| Peganum L. |
peganum |
| Peganum harmala L. |
harmal peganum |
| Pellaea Link |
cliffbrake |
| Pellaea atropurpurea (L.) Link |
purple cliffbrake |
| Pellaea breweri D.C. Eaton |
Brewer's cliffbrake |
| Pellaea bridgesii Hook. |
Bridges' cliffbrake |
| Pellaea glabella Mett. ex Kuhn |
smooth cliffbrake |
| Pellaea glabella Mett. ex Kuhn ssp. simplex (Butters) A. Löve & D. Löve |
smooth cliffbrake |
| Pellaea atropurpurea (L.) Link var. simplex (Butters) Morton |
|
| Pellaea glabella Mett. ex Kuhn var. simplex Butters |
|
| Pellaea occidentalis (E.E. Nelson) Rydb. ssp. simplex (Butters) Gastony |
|
| Pellaea suksdorfiana Butters |
|
| Pellaea mucronata (D.C. Eaton) D.C. Eaton |
birdfoot cliffbrake |
| Pellaea mucronata (D.C. Eaton) D.C. Eaton ssp. mucronata |
birdfoot cliffbrake |
| Pellaea longimucronata Hook. |
|
| Pellaea mucronata (D.C. Eaton) D.C. Eaton var. mucronata |
|
| Pellaea truncata Goodding |
spiny cliffbrake |
| Pellaea longimucronata auct. non Hook. |
|
| Pennisetum Rich. ex Pers. |
fountaingrass |
| Pennisetum glaucum (L.) R. Br. |
pearl millet |
| Panicum americanum L. |
|
| Pennisetum americanum (L.) Leeke |
|
| Pennisetum typhoides auct. non (Burm.) Stapf & C.E. Hubbard |
|
| Penstemon Schmidel |
beardtongue |
| Penstemon ×hybridus hort. ex Groenl. & Rümpler, nom. inval. |
|
| Penstemon acuminatus Douglas ex Lindl. |
sharpleaf penstemon |
| Penstemon acuminatus Douglas ex Lindl. var. latebracteatus N.H. Holmgren |
sharpleaf penstemon |
| Penstemon albomarginatus M.E. Jones |
whitemargin beardtongue |
| Penstemon ambiguus Torr. |
gilia beardtongue |
| Penstemon ambiguus Torr. var. laevissimus (D.D. Keck) N.H. Holmgren |
pink plains beardtongue |
| Penstemon ambiguus Torr. ssp. laevissimus D.D. Keck |
|
| Penstemon arenarius Greene |
Nevada sanddune beardtongue |
| Penstemon maguirei Crosswh. |
|
| Penstemon barnebyi N.H. Holmgren |
White River Valley beardtongue |
| Penstemon bicolor (Brandegee) Clokey & D.D. Keck |
pinto beardtongue |
| Penstemon bicolor (Brandegee) Clokey & D.D. Keck ssp. bicolor |
pinto beardtongue |
| Penstemon bicolor (Brandegee) Clokey & D.D. Keck ssp. roseus Clokey & D.D. Keck |
pinto beardtongue |
| Penstemon comarrhenus A. Gray |
dusty beardtongue |
| Penstemon concinnus D.D. Keck |
Tunnel Springs beardtongue |
| Penstemon confusus M.E. Jones |
Owens Valley beardtongue |
| Penstemon davidsonii Greene |
Davidson's penstemon |
| Penstemon davidsonii Greene var. davidsonii |
Davidson's penstemon |
| Penstemon menziesii Hook. ssp. davidsonii (Greene) Piper |
|
| Penstemon menziesii Hook. ssp. thompsonii Pennell & D.D. Keck |
|
| Penstemon davidsonii Greene var. praeteritus Cronquist |
timberline beardtongue |
| Penstemon deustus Douglas ex Lindl. |
scabland penstemon |
| Penstemon deustus Douglas ex Lindl. var. deustus |
scabland penstemon |
| Penstemon deustus Douglas ex Lindl. var. pedicellatus M.E. Jones |
scabland penstemon |
| Penstemon deustus Douglas ex Lindl. ssp. heterander (Torr. & A. Gray) Pennell & D.D. Keck |
|
| Penstemon deustus Douglas ex Lindl. var. heterander (Torr. & A. Gray) Cronquist |
|
| Penstemon dolius M.E. Jones ex Pennell |
Jones' beardtongue |
| Penstemon dolius M.E. Jones ex Pennell var. dolius |
Jones' beardtongue |
| Penstemon eatonii A. Gray |
firecracker penstemon |
| Penstemon eatonii A. Gray ssp. eatonii |
firecracker penstemon |
| Penstemon eatonii A. Gray var. eatonii |
|
| Penstemon eatonii A. Gray ssp. undosus (M.E. Jones) D.D. Keck |
firecracker penstemon |
| Penstemon eatonii A. Gray var. undosus M.E. Jones |
|
| Penstemon floribundus D. Danley |
Cordillia's beardtongue |
| Penstemon floridus Brandegee |
Panamint beardtongue |
| Penstemon floridus Brandegee var. austinii (Eastw.) N.H. Holmgren |
Austin's beardtongue |
| Penstemon floridus Brandegee ssp. austinii (Eastw.) D.D. Keck |
|
| Penstemon floridus Brandegee var. floridus |
Panamint beardtongue |
| Penstemon fruticiformis Coville |
Death Valley beardtongue |
| Penstemon fruticiformis Coville ssp. amargosae D.D. Keck |
Death Valley beardtongue |
| Penstemon fruticiformis Coville var. amargosae (D.D. Keck) N.H. Holmgren |
|
| Penstemon gracilentus A. Gray |
slender penstemon |
| Penstemon heterodoxus A. Gray |
Sierra beardtongue |
| Penstemon heterodoxus A. Gray var. heterodoxus |
Sierra beardtongue |
| Penstemon humilis Nutt. ex A. Gray |
low beardtongue |
| Penstemon humilis Nutt. ex A. Gray ssp. humilis |
low beardtongue |
| Penstemon cinereus Piper |
|
| Penstemon cinereus Piper var. foliatus D.D. Keck |
|
| Penstemon decurvus Pennell ex Crosswh. |
|
| Penstemon humilis Nutt. ex A. Gray var. deserticus S.L. Welsh, nom. inq. |
|
| Penstemon humilis Nutt. ex A. Gray var. humilis |
|
| Penstemon immanifestus N.H. Holmgren |
Steptoe Valley beardtongue |
| Penstemon janishiae N.H. Holmgren |
Antelope Valley beardtongue |
| Penstemon kingii S. Watson |
King's beardtongue |
| Penstemon nyeensis Crosswh. |
|
| Penstemon leiophyllus Pennell |
smoothleaf beardtongue |
| Penstemon leiophyllus Pennell var. francisci-pennellii (Crosswh.) N.H. Holmgren |
smoothleaf beardtongue |
| Penstemon francisci-pennellii Crosswh. |
|
| Penstemon leiophyllus Pennell var. keckii (Clokey) N.H. Holmgren |
Keck's beardtongue |
| Penstemon keckii Clokey |
|
| Penstemon leonardii Rydb. |
Leonard's beardtongue |
| Penstemon leonardii Rydb. var. patricus (N.H. Holmgren) Neese |
Leonard's beardtongue |
| Penstemon patricus N.H. Holmgren |
|
| Penstemon linarioides A. Gray |
toadflax penstemon |
| Penstemon linarioides A. Gray ssp. compactifolius D.D. Keck |
toadflax beardtongue |
| Penstemon linarioides A. Gray ssp. sileri (A. Gray) D.D. Keck |
Siler's penstemon |
| Penstemon linarioides A. Gray var. sileri A. Gray |
|
| Penstemon linarioides A. Gray var. viridis D.D. Keck |
|
| Penstemon moriahensis N.H. Holmgren |
Mt. Moriah beardtongue |
| Penstemon newberryi A. Gray |
mountain pride |
| Penstemon newberryi A. Gray ssp. newberryi |
mountain pride |
| Penstemon newberryi A. Gray var. newberryi |
|
| Penstemon pachyphyllus A. Gray ex Rydb. |
thickleaf beardtongue |
| Penstemon pachyphyllus A. Gray ex Rydb. var. congestus (M.E. Jones) N.H. Holmgren |
thickleaf beardtongue |
| Penstemon congestus (M.E. Jones) Pennell |
|
| Penstemon pachyphyllus A. Gray ex Rydb. ssp. congestus (M.E. Jones) D.D. Keck |
|
| Penstemon pahutensis N.H. Holmgren |
Paiute beardtongue |
| Penstemon palmeri A. Gray |
Palmer's penstemon |
| Penstemon palmeri A. Gray var. macranthus (Eastw.) N.H. Holmgren |
scented beardtongue |
| Penstemon macranthus Eastw. |
|
| Penstemon palmeri A. Gray var. palmeri |
Palmer's penstemon |
| Penstemon palmeri A. Gray ssp. typicus D.D. Keck |
|
| Penstemon patens (M.E. Jones) N.H. Holmgren |
Lone Pine beardtongue |
| Penstemon confusus M.E. Jones ssp. patens (M.E. Jones) D.D. Keck |
|
| Penstemon petiolatus Brandegee |
petiolate beardtongue |
| Penstemon platyphyllus Rydb. |
broadleaf beardtongue |
| Penstemon pratensis Greene |
western whiteflower beardtongue |
| Penstemon procerus Douglas ex Graham |
littleflower penstemon |
| Penstemon procerus Douglas ex Graham var. formosus (A. Nelson) Cronquist |
pincushion beardtongue |
| Penstemon procerus Douglas ex Graham ssp. formosus (A. Nelson) D.D. Keck |
|
| Penstemon tolmiei Hook. ssp. formosus (A. Nelson) D.D. Keck |
|
| Penstemon procerus Douglas ex Graham var. modestus (Greene) N.H. Holmgren |
pincushion beardtongue |
| Penstemon modestus Greene |
|
| Penstemon procerus Douglas ex Graham ssp. modestus (Greene) D.D. Keck |
|
| Penstemon pudicus Reveal & Beatley |
Kawich Range beardtongue |
| Penstemon radicosus A. Nelson |
matroot penstemon |
| Penstemon rhizomatosus N.H. Holmgren |
Scheel Creek beardtongue |
| Penstemon roezlii Regel |
Roezl's penstemon |
| Penstemon cinerascens Greene ex C.F. Baker |
|
| Penstemon laetus A. Gray ssp. roezlii (Regel) D.D. Keck |
|
| Penstemon laetus A. Gray var. roezlii (Regel) Jeps. |
|
| Penstemon rostriflorus Kellogg |
Bridge penstemon |
| Penstemon bridgesii A. Gray |
|
| Penstemon bridgesii A. Gray var. amplexicaulis Monnet |
|
| Penstemon rubicundus D.D. Keck |
Wassuk Range beardtongue |
| Penstemon rydbergii A. Nelson |
Rydberg's penstemon |
| Penstemon rydbergii A. Nelson var. oreocharis (Greene) N.H. Holmgren |
herbaceous penstemon |
| Penstemon oreocharis Greene |
|
| Penstemon rydbergii A. Nelson var. rydbergii |
swollen penstemon |
| Penstemon hesperius M. Peck |
|
| Penstemon rydbergii A. Nelson var. varians (A. Nelson) Cronquist |
|
| Penstemon vaseyanus Greene |
|
| Penstemon scapoides D.D. Keck |
pinyon beardtongue |
| Penstemon speciosus Douglas ex Lindl. |
royal penstemon |
| Penstemon speciosus Douglas ex Lindl. ssp. kennedyi (A. Nelson) D.D. Keck |
|
| Penstemon sudans M.E. Jones |
Susanville beardtongue |
| Penstemon deustus Douglas ex Lindl. ssp. sudans (M.E. Jones) Pennell & D.D. Keck |
|
| Penstemon thompsoniae (A. Gray) Rydb. |
Thompson's beardtongue |
| Penstemon thompsoniae (A. Gray) Rydb. ssp. jaegeri D.D. Keck |
Jaeger's beardtongue |
| Penstemon thompsoniae (A. Gray) Rydb. ssp. thompsoniae |
Thompson's beardtongue |
| Penstemon thompsoniae (A. Gray) Rydb. var. desperatus Neese |
|
| Penstemon thurberi Torr. |
Thurber's penstemon |
| Penstemon thurberi Torr. var. anestius Reveal & Beatley |
|
| Penstemon tiehmii N.H. Holmgren |
Tiehm's beardtongue |
| Penstemon utahensis Eastw. |
Utah penstemon |
| Penstemon watsonii A. Gray |
Watson's penstemon |
| Pentagramma Yatsk., Windham & E. Wollenw. |
goldback fern |
| Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw. |
goldback fern |
| Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw. ssp. triangularis |
goldback fern |
| Pityrogramma triangularis (Kaulf.) Maxon |
|
| Peraphyllum Nutt. |
peraphyllum |
| Peraphyllum ramosissimum Nutt. |
wild crab apple |
| Pericome A. Gray |
pericome |
| Pericome caudata A. Gray |
mountain tail-leaf |
| Pericome caudata A. Gray var. glandulosa (Goodman) Harrington |
|
| Pericome glandulosa Goodman |
|
| Perideridia Rchb. |
yampah |
| Perideridia bolanderi (A. Gray) A. Nelson & J.F. Macbr. |
Bolander's yampah |
| Perideridia bolanderi (A. Gray) A. Nelson & J.F. Macbr. ssp. bolanderi |
Bolander's yampah |
| Perideridia gairdneri (Hook. & Arn.) Mathias |
Gardner's yampah |
| Perideridia gairdneri (Hook. & Arn.) Mathias ssp. borealis T.I. Chuang & Constance |
common yampah |
| Atenia montana (Blank.) Rydb. |
|
| Carum montanum Blank. |
|
| Perideridia montana (Blank.) Dorn |
|
| Perideridia lemmonii (J.M. Coult. & Rose) T.I. Chuang & Constance |
Lemmon's yampah |
| Perideridia parishii (J.M. Coult. & Rose) A. Nelson & J.F. Macbr. |
Parish's yampah |
| Perideridia parishii (J.M. Coult. & Rose) A. Nelson & J.F. Macbr. ssp. latifolia (A. Gray) T.I. Chuang & Constance |
Parish's yampah |
| Perityle Benth. |
rockdaisy |
| Perityle congesta (M.E. Jones) Shinners |
Grand Canyon rockdaisy |
| Laphamia congesta M.E. Jones |
|
| Perityle emoryi Torr. |
Emory's rockdaisy |
| Perityle emoryi Torr. var. nuda (Torr.) A. Gray |
|
| Perityle gracilis (M.E. Jones) Rydb. |
three-lobed rockdaisy |
| Laphamia fastigiata Brandegee |
|
| Laphamia gracilis M.E. Jones |
|
| Perityle fastigiata (Brandegee) Shinners |
|
| Perityle intricata (Brandegee) Shinners |
narrowleaf laphamia |
| Laphamia intricata Brandegee |
|
| Laphamia megalocephala S. Watson ssp. intricata (Brandegee) D.D. Keck |
|
| Perityle megalocephala (S. Watson) J.F. Macbr. var. intricata (Brandegee) A. Powell |
|
| Perityle megalocephala (S. Watson) J.F. Macbr. |
Nevada rockdaisy |
| Perityle megalocephala (S. Watson) J.F. Macbr. var. megalocephala |
Nevada rockdaisy |
| Laphamia megalocephala S. Watson |
|
| Perityle stansburyi (A. Gray) J.F. Macbr. |
Stansbury's rockdaisy |
| Laphamia stansburii A. Gray, orth. var. |
|
| Laphamia stansburyi A. Gray |
|
| Perityle stansburii (A. Gray) J.F. Macbr., orth. var. |
|
| Perityle tenella (M.E. Jones) J.F. Macbr. |
Springdale rockdaisy |
| Laphamia palmeri A. Gray |
|
| Laphamia palmeri A. Gray var. tenella M.E. Jones |
|
| Petalonyx A. Gray |
sandpaper plant |
| Petalonyx nitidus S. Watson |
shinyleaf sandpaper plant |
| Petalonyx parryi A. Gray |
Parry's sandpaper plant |
| Petalonyx thurberi A. Gray |
Thurber's sandpaper plant |
| Petalonyx thurberi A. Gray ssp. gilmanii (Munz) Davis & H.J. Thomp. |
Death Valley sandpaper plant |
| Petalonyx gilmanii Munz |
|
| Petalonyx thurberi A. Gray var. gilmanii (Munz) L.D. Benson |
|
| Petalonyx thurberi A. Gray ssp. thurberi |
Thurber's sandpaper plant |
| Peteria A. Gray |
peteria |
| Peteria thompsoniae S. Watson |
Thompson's peteria |
| Peteria nevadensis Tidestr. |
|
| Petradoria Greene |
rock goldenrod |
| Petradoria pumila (Nutt.) Greene |
rock goldenrod |
| Petradoria pumila (Nutt.) Greene ssp. pumila |
rock goldenrod |
| Solidago petradoria S.F. Blake |
|
| Petrophytum (Nutt. ex Torr. & A. Gray) Rydb. |
rockspirea |
| Petrophyton Rydb., orth. var. |
|
| Petrophytum caespitosum (Nutt.) Rydb. |
mat rockspirea |
| Petrophytum caespitosum (Nutt.) Rydb. var. caespitosum |
mat rockspirea |
| Eriogynia caespitosa (Nutt.) S. Watson |
|
| Petrophytum caespitosum (Nutt.) Rydb. ssp. caespitosum |
|
| Spiraea caespitosa Nutt. |
|
| Petrophytum caespitosum (Nutt.) Rydb. var. elatius (S. Watson) Tidestr. |
mat rockspirea |
| Petroselinum J. Hill |
parsley |
| Petroselinum crispum (Mill.) Nyman ex A.W. Hill |
parsley |
| Apium petroselinum L. |
|
| Carum petroselinum (L.) Benth. & Hook. f. |
|
| Petroselinum hortense Hoffm. |
|
| Petroselinum sativum Hoffm. |
|
| Petroselinum vulgare Lagasca |
|
| Peucephyllum A. Gray |
pygmycedar |
| Peucephyllum schottii A. Gray |
Schott's pygmycedar |
| Phacelia Juss. |
phacelia |
| Phacelia adenophora J.T. Howell |
glandular yellow phacelia |
| Miltitzia glandulifera (Torr. ex S. Watson) A. Heller |
|
| Phacelia lutea (Hook. & Arn.) J.T. Howell var. glandulifera (Torr. ex S. Watson) Cronquist |
|
| Phacelia affinis A. Gray |
limestone phacelia |
| Phacelia affinis A. Gray var. patens J.T. Howell |
|
| Phacelia anelsonii J.F. Macbr. |
Aven Nelson's phacelia |
| Phacelia austromontana J.T. Howell |
Southern Sierra phacelia |
| Phacelia humilis Torr. & A. Gray var. lobata Davidson |
|
| Phacelia lobata (Davidson) Jeps. |
|
| Phacelia barnebyana J.T. Howell |
Barneby's phacelia |
| Phacelia beatleyae Reveal & Constance |
Beatley's phacelia |
| Phacelia bicolor Torr. ex S. Watson |
twocolor phacelia |
| Phacelia bicolor Torr. ex S. Watson var. bicolor |
|
| Phacelia calthifolia Brand |
calthaleaf phacelia |
| Phacelia cicutaria Greene |
caterpillar phacelia |
| Phacelia cicutaria Greene var. hispida (A. Gray) J.T. Howell |
caterpillar phacelia |
| Phacelia cicutaria Greene ssp. hispida (A. Gray) R.M. Beauch. ex Thorne |
|
| Phacelia coerulea Greene |
skyblue phacelia |
| Phacelia caerulea Greene, orth. var. |
|
| Phacelia intermedia Woot. p.p. |
|
| Phacelia crenulata Torr. ex S. Watson |
cleftleaf wildheliotrope |
| Phacelia crenulata Torr. ex S. Watson var. ambigua (M.E. Jones) J.F. Macbr. |
purplestem phacelia |
| Phacelia ambigua M.E. Jones |
|
| Phacelia crenulata Torr. ex S. Watson var. corrugata (A. Nelson) Brand |
cleftleaf wildheiotrope |
| Phacelia corrugata A. Nelson |
|
| Phacelia crenulata Torr. ex S. Watson var. crenulata |
cleftleaf wildheliotrope |
| Phacelia crenulata Torr. ex S. Watson var. funerea J. Voss ex Munz |
|
| Phacelia crenulata Torr. ex S. Watson var. vulgaris Brand |
|
| Phacelia intermedia Woot. p.p. |
|
| Phacelia cryptantha Greene |
hiddenflower phacelia |
| Phacelia cryptantha Greene var. derivata J. Voss |
|
| Phacelia curvipes Torr. ex S. Watson |
Washoe phacelia |
| Phacelia davidsonii A. Gray |
Davidson's phacelia |
| Phacelia curvipes Torr. ex S. Watson var. macrantha (Parish) Munz |
|
| Phacelia distans Benth. |
distant phacelia |
| Phacelia cinerea Eastw. ex J.F. Macbr. |
|
| Phacelia distans Benth. var. australis Brand |
|
| Phacelia fremontii Torr. |
Fremont's phacelia |
| Phacelia geraniifolia Brand |
geraniumleaf phacelia |
| Phacelia perityloides Coville var. jaegeri Munz |
|
| Phacelia glaberrima (Torr. ex S. Watson) J.T. Howell |
southwestern phacelia |
| Phacelia glandulifera Piper |
sticky phacelia |
| Phacelia ivesiana Torr. var. glandulifera (Piper) A. Nelson & J.F. Macbr. |
|
| Phacelia gymnoclada Torr. ex S. Watson |
nakedstem phacelia |
| Phacelia crassifolia Torr. ex S. Watson |
|
| Phacelia hastata Douglas ex Lehm. |
silverleaf phacelia |
| Phacelia hastata Douglas ex Lehm. var. charlestonensis Cronquist |
Charleston phacelia |
| Phacelia hastata Douglas ex Lehm. var. compacta (Brand) Cronquist |
compact phacelia |
| Phacelia frigida Greene |
|
| Phacelia hastata Douglas ex Lehm. ssp. compacta (Brand) Heckard |
|
| Phacelia hastata Douglas ex Lehm. var. hastata |
silverleaf phacelia |
| Phacelia alpina Rydb. |
|
| Phacelia hastata Douglas ex Lehm. ssp. hastata |
|
| Phacelia hastata Douglas ex Lehm. var. alpina (Rydb.) Cronquist |
|
| Phacelia hastata Douglas ex Lehm. var. leucophylla (Torr.) Cronquist |
|
| Phacelia leucophylla Torr. |
|
| Phacelia leucophylla Torr. var. alpina (Rydb.) Dundas |
|
| Phacelia leucophylla Torr. var. suksdorfii J.F. Macbr. |
|
| Phacelia oreopola Heckard ssp. simulans Heckard |
|
| Phacelia heterophylla Pursh |
varileaf phacelia |
| Phacelia heterophylla Pursh ssp. virgata (Greene) Heckard |
varileaf phacelia |
| Phacelia heterophylla Pursh var. virgata (Greene) Dorn |
|
| Phacelia humilis Torr. & A. Gray |
low phacelia |
| Phacelia humilis Torr. & A. Gray var. humilis |
low phacelia |
| Phacelia hydrophylloides Torr. ex A. Gray |
waterleaf phacelia |
| Phacelia incana Brand |
hoary phacelia |
| Phacelia nevadensis J.T. Howell |
|
| Phacelia inconspicua Greene |
hidden phacelia |
| Phacelia inundata J.T. Howell |
playa yellow phacelia |
| Miltitzia parviflora (A. Gray ex Newberry) Brand |
|
| Phacelia ivesiana Torr. |
Ives' phacelia |
| Phacelia ivesiana Torr. var. ivesiana |
Ives' phacelia |
| Phacelia ivesiana Torr. var. typica J.T. Howell |
|
| Phacelia ivesiana Torr. var. pediculoides J.T. Howell |
Ives' phacelia |
| Phacelia pediculoides (J.T. Howell) Constance |
|
| Phacelia laxiflora J.T. Howell |
dozing phacelia |
| Phacelia perityloides Coville var. laxiflora (J.T. Howell) Cronquist |
|
| Phacelia lemmonii A. Gray |
Lemmon's phacelia |
| Phacelia linearis (Pursh) Holz. |
threadleaf phacelia |
| Phacelia lutea (Hook. & Arn.) J.T. Howell |
yellow phacelia |
| Phacelia lutea (Hook. & Arn.) J.T. Howell var. calva Cronquist |
Owyhee phacelia |
| Phacelia lutea (Hook. & Arn.) J.T. Howell var. lutea |
yellow phacelia |
| Miltitzia lutea (Hook. & Arn.) A. DC. |
|
| Phacelia lutea (Hook. & Arn.) J.T. Howell var. purpurascens J.T. Howell |
|
| Phacelia minutissima L.F. Hend. |
small phacelia |
| Phacelia monoensis Halse |
Mono phacelia |
| Phacelia mustelina Coville |
weasel phacelia |
| Phacelia mutabilis Greene |
changeable phacelia |
| Phacelia californica Cham. var. jacintensis Dundas |
|
| Phacelia heterophylla Pursh var. griseophylla (Brand) J.F. Macbr. |
|
| Phacelia heterophylla Pursh var. pseudohispida (Brand) Cronquist |
|
| Phacelia neglecta M.E. Jones |
alkali phacelia |
| Phacelia palmeri Torr. ex S. Watson |
Palmer's phacelia |
| Phacelia palmeri Torr. ex S. Watson var. foetida (Goodding) Brand |
|
| Phacelia parishii A. Gray |
Parish's phacelia |
| Phacelia pedicellata A. Gray |
pedicellate phacelia |
| Phacelia peirsoniana J.T. Howell |
handsome phacelia |
| Phacelia procera A. Gray |
tall phacelia |
| Phacelia pulchella A. Gray |
beautiful phacelia |
| Phacelia pulchella A. Gray var. gooddingii (Brand) J.T. Howell |
Goodding's phacelia |
| Phacelia pulchella A. Gray var. pulchella |
beautiful phacelia |
| Phacelia pulchella A. Gray var. typica J.T. Howell |
|
| Phacelia ramosissima Douglas ex Lehm. |
branching phacelia |
| Phacelia ramosissima Douglas ex Lehm. var. eremophila (Greene) J.F. Macbr. |
branching phacelia |
| Phacelia eremophila Greene |
|
| Phacelia ramosissima Douglas ex Lehm. var. valida M. Peck |
|
| Phacelia ramosissima Douglas ex Lehm. var. latifolia (Torr.) Cronquist |
branching phacelia |
| Phacelia ramosissima Douglas ex Lehm. var. suffrutescens (Parry) A. Gray |
|
| Phacelia suffrutescens Parry |
|
| Phacelia ramosissima Douglas ex Lehm. var. ramosissima |
branching phacelia |
| Phacelia ramosissima Douglas ex Lehm. var. subglabra M. Peck |
branching phacelia |
| Phacelia rattanii A. Gray |
Rattan's phacelia |
| Phacelia rotundifolia Torr. ex S. Watson |
roundleaf phacelia |
| Phacelia salina (A. Nelson) J.T. Howell |
Bitter Creek phacelia |
| Phacelia saxicola A. Gray |
stonecrop phacelia |
| Phacelia scopulina (A. Nelson) J.T. Howell |
Debeque phacelia |
| Phacelia scopulina (A. Nelson) J.T. Howell var. scopulina |
Debeque phacelia |
| Miltitzia scopulina (A. Nelson) Rydb. |
|
| Phacelia lutea (Hook. & Arn.) J.T. Howell var. scopulina (A. Nelson) Cronquist |
|
| Phacelia sericea (Graham) A. Gray |
silky phacelia |
| Phacelia sericea (Graham) A. Gray ssp. ciliosa (Rydb.) G.W. Gillett |
silky phacelia |
| Phacelia ciliosa (Rydb.) Rydb. |
|
| Phacelia sericea (Graham) A. Gray var. ciliosa Rydb. |
|
| Phacelia tanacetifolia Benth. |
lacy phacelia |
| Phacelia tanacetifolia Benth. subvar. tenuisecta Brand |
|
| Phacelia tetramera J.T. Howell |
fourpart phacelia |
| Miltitzia pusilla (A. Gray) Brand |
|
| Phacelia thermalis Greene |
heated phacelia |
| Phacelia vallis-mortae J. Voss |
Death Valley phacelia |
| Phacelia vallis-mortae J. Voss var. vallis-mortae |
Death Valley phacelia |
| Phalaris L. |
canarygrass |
| Phalaris arundinacea L. |
reed canarygrass |
| Phalaris arundinacea L. var. picta L. |
|
| Phalaroides arundinacea (L.) Raeusch. |
|
| Phalaroides arundinacea (L.) Raeusch. var. picta (L.) Tzvelev |
|
| Phalaris caroliniana Walter |
Carolina canarygrass |
| Philadelphus L. |
mock orange |
| Philadelphus argenteus Rydb. |
silver mock orange |
| Philadelphus microphyllus A. Gray ssp. argenteus (Rydb.) C.L. Hitchc. |
|
| Philadelphus microphyllus A. Gray var. argenteus (Rydb.) Kearney & Peebles |
|
| Philadelphus microphyllus A. Gray |
littleleaf mock orange |
| Philadelphus microphyllus A. Gray ssp. occidentalis (A. Nelson) C.L. Hitchc. |
|
| Philadelphus microphyllus A. Gray ssp. stramineus (Rydb.) C.L. Hitchc. |
|
| Philadelphus microphyllus A. Gray ssp. typicus C.L. Hitchc. |
|
| Philadelphus microphyllus A. Gray var. linearis Hu |
|
| Philadelphus microphyllus A. Gray var. minutus (Rydb.) Hu |
|
| Philadelphus microphyllus A. Gray var. occidentalis (A. Nelson) Dorn |
|
| Philadelphus microphyllus A. Gray var. ovatus Hu |
|
| Philadelphus occidentalis A. Nelson |
|
| Philadelphus occidentalis A. Nelson var. occidentalis |
|
| Philadelphus stramineus Rydb. |
|
| Phleum L. |
timothy |
| Phleum alpinum L. |
alpine timothy |
| Phleum alpinum L. var. commutatum (Gaudin) Griseb. |
|
| Phleum commutatum Gaudin |
|
| Phleum commutatum Gaudin var. americanum (Fourn.) Hultén |
|
| Phleum pratense L. |
timothy |
| Phleum nodosum L. |
|
| Phleum pratense L. ssp. nodosum (L.) Arcang. |
|
| Phleum pratense L. var. nodosum (L.) Huds. |
|
| Phlox L. |
phlox |
| Phlox austromontana Coville |
mountain phlox |
| Phlox austromontana Coville ssp. austromontana |
mountain phlox |
| Phlox austromontana Coville ssp. vera Wherry |
|
| Phlox austromontana Coville var. lutescens S.L. Welsh |
|
| Phlox austromontana Coville ssp. densa (Brand) Wherry |
dense mountain phlox |
| Phlox austromontana Coville ssp. prostrata (E.E. Nelson) Wherry |
prostrate mountain phlox |
| Phlox austromontana Coville var. prostrata E.E. Nelson |
|
| Phlox caespitosa Nutt. |
tufted phlox |
| Phlox caespitosa Nutt. ssp. eucaespitosa Brand |
|
| Phlox douglasii Hook. |
|
| Phlox douglasii Hook. ssp. eudouglasii Brand |
|
| Phlox condensata (A. Gray) E.E. Nelson |
dwarf phlox |
| Phlox caespitosa Nutt. ssp. condensata (A. Gray) Wherry |
|
| Phlox covillei E.E. Nelson |
Coville's phlox |
| Phlox diffusa Benth. |
spreading phlox |
| Phlox diffusa Benth. ssp. diffusa |
spreading phlox |
| Phlox azurea Glad. L. Sm. |
|
| Phlox diffusa Benth. ssp. longistylis Wherry |
spreading phlox |
| Phlox diffusa Benth. var. longistylis (Wherry) M. Peck |
|
| Phlox diffusa Benth. ssp. scleranthifolia (Rydb.) Wherry |
spreading phlox |
| Phlox scleranthifolia Rydb. |
|
| Phlox diffusa Benth. ssp. subcarinata Wherry |
spreading phlox |
| Phlox cyanea Eastw. |
|
| Phlox gladiformis (M.E. Jones) E.E. Nelson |
musky phlox |
| Phlox griseola Wherry |
grayleaf phlox |
| Phlox griseola Wherry ssp. griseola |
grayleaf phlox |
| Phlox griseola Wherry ssp. tumulosa Wherry |
mound phlox |
| Phlox tumulosa (Wherry) Wherry |
|
| Phlox hoodii Richardson |
spiny phlox |
| Phlox hoodii Richardson ssp. canescens (Torr. & A. Gray) Wherry |
carpet phlox |
| Phlox canescens Torr. & A. Gray |
|
| Phlox hoodii Richardson var. canescens (Torr. & A. Gray) M. Peck |
|
| Phlox hoodii Richardson ssp. lanata (Piper) Munz |
carpet phlox |
| Phlox lanata Piper |
|
| Phlox hoodii Richardson ssp. muscoides (Nutt.) Wherry |
musk phlox |
| Phlox bryoides Nutt. |
|
| Phlox muscoides Nutt. |
|
| Phlox kelseyi Britton |
Kelsey's phlox |
| Phlox kelseyi Britton ssp. salina (M.E. Jones) Wherry |
saline phlox |
| Phlox longifolia Nutt. |
longleaf phlox |
| Phlox longifolia Nutt. ssp. brevifolia (A. Gray) H. Mason |
longleaf phlox |
| Phlox grayi Woot. & Standl. |
|
| Phlox longifolia Nutt. ssp. longifolia |
longleaf phlox |
| Phlox grahamii Wherry |
|
| Phlox longifolia Nutt. ssp. calva Wherry |
|
| Phlox longifolia Nutt. ssp. cortezana (A. Nelson) Wherry |
|
| Phlox longifolia Nutt. ssp. humilis (Brand) Wherry |
|
| Phlox longifolia Nutt. ssp. typica Wherry |
|
| Phlox longifolia Nutt. var. linearifolia (Hook.) Brand |
|
| Phlox longifolia Nutt. var. peberula E.E. Nelson |
|
| Phlox multiflora A. Nelson |
flowery phlox |
| Phlox multiflora A. Nelson ssp. depressa (E.E. Nelson) Wherry |
Rocky Mountain phlox |
| Phlox multiflora A. Nelson ssp. costata (Rydb.) Wherry |
|
| Phlox pulvinata (Wherry) Cronquist |
cushion phlox |
| Phlox caespitosa Nutt. ssp. platyphylla Wherry |
|
| Phlox caespitosa Nutt. ssp. pulvinata Wherry |
|
| Phlox sibirica L. ssp. pulvinata (Wherry) W.A. Weber |
|
| Phlox rigida Benth. |
stiff phlox |
| Phlox douglasii Hook. ssp. rigida (Benth.) Wherry |
|
| Phlox speciosa Pursh |
showy phlox |
| Phlox speciosa Pursh ssp. occidentalis (Durand ex Torr.) Wherry |
showy phlox |
| Phlox speciosa Pursh var. occidentalis (Durand ex Torr.) M. Peck |
|
| Phlox stansburyi (Torr.) A. Heller |
cold-desert phlox |
| Phlox stansburyi (Torr.) A. Heller ssp. stansburyi |
cold-desert phlox |
| Phlox longifolia Nutt. var. stansburyi (Torr.) A. Gray |
|
| Phlox stansburyi (Torr.) A. Heller ssp. eustansburyi Brand |
|
| Phlox stansburyi (Torr.) A. Heller var. brevifolia (A. Gray) E.E. Nelson |
|
| Phlox stansburyi (Torr.) A. Heller ssp. superba (Brand) Wherry |
cold-desert phlox |
| Phlox superba Brand |
|
| Phlox viridis E.E. Nelson |
green phlox |
| Phlox viridis E.E. Nelson ssp. compacta (Brand) Wherry |
green phlox |
| Phlox longifolia Nutt. ssp. compacta (Brand) Wherry |
|
| Phlox viridis E.E. Nelson ssp. longipes (M.E. Jones) Wherry |
green phlox |
| Phlox longifolia Nutt. ssp. longipes (M.E. Jones) Wherry |
|
| Phlox longifolia Nutt. var. longipes (M.E. Jones) M. Peck |
|
| Phlox longifolia Nutt. var. puberula E.E. Nelson |
|
| Phlox viridis E.E. Nelson ssp. viridis |
green phlox |
| Phlox longifolia Nutt. ssp. viridis (E.E. Nelson) Wherry |
|
| Phlox longifolia Nutt. var. viridis (E.E. Nelson) Peabody |
|
| Phlox viscida E.E. Nelson |
sticky phlox |
| Phoenicaulis Nutt. |
phoenicaulis |
| Phoenicaulis cheiranthoides Nutt. |
wallflower phoenicaulis |
| Phoenicaulis cheiranthoides Nutt. ssp. glabra (Jeps.) Abrams |
|
| Phoenicaulis cheiranthoides Nutt. ssp. lanuginosa (S. Watson) Abrams |
|
| Phoenicaulis cheiranthoides Nutt. var. glabra Jeps. |
|
| Phoenicaulis cheiranthoides Nutt. var. lanuginosa (S. Watson) Rollins |
|
| Pholistoma Lilja |
fiestaflower |
| Pholistoma auritum (Lindl.) Lilja |
blue fiestaflower |
| Pholistoma auritum (Lindl.) Lilja var. arizonicum (M.E. Jones) Constance |
Arizona fiestaflower |
| Pholistoma membranaceum (Benth.) Constance |
white fiestaflower |
| Phoradendron Nutt. |
mistletoe |
| Phoradendron californicum Nutt. |
mesquite mistletoe |
| Phoradendron californicum Nutt. var. distans Trel. |
|
| Phoradendron californicum Nutt. var. leucocarpum (Trel.) Jeps. |
|
| Phoradendron juniperinum Engelm. ex A. Gray |
juniper mistletoe |
| Phoradendron juniperinum Engelm. ex A. Gray var. ligatum (Trel.) Fosberg |
|
| Phoradendron ligatum Trel. |
|
| Phragmites Adans. |
reed |
| Phragmites australis (Cav.) Trin. ex Steud. |
common reed |
| Phragmites australis (Cav.) Trin. ex Steud. var. berlandieri (Fourn.) C.F. Reed |
|
| Phragmites communis Trin. |
|
| Phragmites communis Trin. ssp. berlandieri (Fourn.) A. Löve & D. Löve |
|
| Phragmites communis Trin. var. berlandieri (Fourn.) Fernald |
|
| Phragmites phragmites (L.) Karst. |
|
| Phyla Lour. |
fogfruit |
| Phyla lanceolata (Michx.) Greene |
lanceleaf fogfruit |
| Lippia lanceolata Michx. |
|
| Lippia lanceolata Michx. var. recognita Fernald & Grisc. |
|
| Phyla lanceolata (Michx.) Greene var. recognita (Fernald & Grisc.) Soper |
|
| Phyla nodiflora (L.) Greene |
turkey tangle fogfruit |
| Lippia incisa (Small) Tidestr. |
|
| Lippia nodiflora (L.) Michx. |
|
| Lippia nodiflora (L.) Michx. var. reptans (Kunth) Kuntze |
|
| Lippia reptans Kunth |
|
| Phyla incisa Small |
|
| Phyla nodiflora (L.) Greene var. incisa (Small) Moldenke |
|
| Phyla nodiflora (L.) Greene var. longifolia Moldenke |
|
| Phyla nodiflora (L.) Greene var. nodiflora |
|
| Phyla nodiflora (L.) Greene var. repens (Spreng.) Moldenke |
|
| Phyla nodiflora (L.) Greene var. reptans (Kunth) Moldenke |
|
| Phyla nodiflora (L.) Greene var. rosea (D. Don) Moldenke |
|
| Phyllodoce Salisb. |
mountainheath |
| Phyllodoce breweri (A. Gray) A. Heller |
purple mountainheath |
| Physalis L. |
groundcherry |
| Physalis angulata L. |
cutleaf groundcherry |
| Physalis angulata L. var. angulata |
|
| Physalis angulata L. var. lanceifolia (Nees) Waterf. |
|
| Physalis angulata L. var. pendula (Rydb.) Waterf. |
|
| Physalis lanceifolia Nees |
|
| Physalis pendula Rydb. |
|
| Physalis crassifolia Benth. |
yellow nightshade groundcherry |
| Physalis crassifolia Benth. var. crassifolia |
yellow nightshade groundcherry |
| Physalis crassifolia Benth. var. cardiophylla (Torr.) A. Gray |
|
| Physalis greenei Vasey & Rose |
|
| Physalis crassifolia Benth. var. versicolor (Rydb.) Waterf. |
yellow nightshade groundcherry |
| Physalis versicolor Rydb. |
|
| Physalis hederifolia A. Gray |
ivyleaf groundcherry |
| Physalis hederifolia A. Gray var. fendleri (A. Gray) Cronquist |
Fendler's groundcherry |
| Physalis fendleri A. Gray |
|
| Physalis fendleri A. Gray var. cordifolia A. Gray |
|
| Physalis hederifolia A. Gray var. cordifolia (A. Gray) Waterf. |
|
| Physalis hederifolia A. Gray var. hederifolia |
ivyleaf groundcherry |
| Physalis hederifolia A. Gray var. puberula A. Gray |
|
| Physalis hederifolia A. Gray var. palmeri (A. Gray) Cronquist |
Palmer's groundcherry |
| Physalis palmeri A. Gray |
|
| Physalis longifolia Nutt. |
longleaf groundcherry |
| Physalis longifolia Nutt. var. longifolia |
longleaf groundcherry |
| Physalis pumila Nutt. var. sonorae Torr. |
|
| Physalis rigida Pollard & Ball |
|
| Physalis virginiana Mill. var. sonorae (Torr.) Waterf. |
|
| Physaria (Nutt. ex Torr. & A. Gray) A. Gray |
twinpod |
| Physaria acutifolia Rydb. |
sharpleaf twinpod |
| Physaria acutifolia Rydb. var. acutifolia |
sharpleaf twinpod |
| Physaria australis (Payson) Rollins |
|
| Physaria chambersii Rollins |
Chambers' twinpod |
| Physaria chambersii Rollins var. sobolifera S.L. Welsh |
|
| Physaria newberryi A. Gray |
Newberry's twinpod |
| Physaria newberryi A. Gray var. newberryi |
Newberry's twinpod |
| Physaria didymocarpa (Hook.) A. Gray var. newberryi (A. Gray) M.E. Jones |
|
| Physocarpus (Camb.) Raf. |
ninebark |
| Physocarpus alternans (M.E. Jones) J.T. Howell |
dwarf ninebark |
| Physocarpus alternans (M.E. Jones) J.T. Howell ssp. alternans |
dwarf ninebark |
| Physocarpus malvaceus (Greene) Kuntze |
mallow ninebark |
| Physocarpus monogynus (Torr.) J.M. Coult. |
mountain ninebark |
| Picea A. Dietr. |
spruce |
| Picea engelmannii Parry ex Engelm. |
Engelmann spruce |
| Picea engelmannii Parry ex Engelm. var. engelmannii |
Engelmann spruce |
| Picea glauca (Moench) Voss ssp. engelmannii (Parry ex Engelm.) T.M.C. Taylor |
|
| Picea glauca (Moench) Voss var. engelmannii (Parry ex Engelm.) B. Boivin |
|
| Picrothamnus Nutt. |
bud sagebrush |
| Picrothamnus desertorum Nutt. |
bud sagebrush |
| Artemisia spinescens D.C. Eaton |
|
| Pilostyles Guill. |
stemsucker |
| Pilostyles thurberi A. Gray |
Thurber's stemsucker |
| Pinus L. |
pine |
| Pinus albicaulis Engelm. |
whitebark pine |
| Pinus contorta Douglas ex Louden |
lodgepole pine |
| Pinus contorta Douglas ex Louden var. murrayana (Balf.) Engelm. |
Sierra lodgepole pine |
| Pinus contorta Douglas ex Louden ssp. murrayana (Balf.) Critchfield |
|
| Pinus murrayana Balf. |
|
| Pinus edulis Engelm. |
twoneedle pinyon |
| Pinus cembroides Zucc. var. edulis (Engelm.) Voss |
|
| Pinus flexilis James |
limber pine |
| Pinus jeffreyi Balf. |
Jeffrey pine |
| Pinus ponderosa C. Lawson ssp. jeffreyi (Balf.) Engelm. |
|
| Pinus lambertiana Douglas |
sugar pine |
| Pinus longaeva D.K. Bailey |
Great Basin bristlecone pine |
| Pinus aristata Engelm. var. longaeva (D.K. Bailey) Little |
|
| Pinus monophylla Torr. & Frém. |
singleleaf pinyon |
| Pinus monophylla Torr. & Frém. var. fallax (Little) Silba |
singleleaf pinyon |
| Pinus edulis Engelm. var. fallax Little |
|
| Pinus monophylla Torr. & Frém. var. monophylla |
singleleaf pinyon |
| Pinus monticola Douglas ex D. Don |
western white pine |
| Pinus strobus L. var. monticola (Douglas ex D. Don) Nutt. |
|
| Pinus ponderosa C. Lawson |
ponderosa pine |
| Pinus ponderosa C. Lawson var. ponderosa |
ponderosa pine |
| Pinus beardsleyi A. Murray |
|
| Pinus benthamiana Hartw. |
|
| Pinus brachyptera Engelm. |
|
| Pinus ponderosa C. Lawson var. scopulorum Engelm. |
ponderosa pine |
| Pinus ponderosa C. Lawson ssp. scopulorum (Engelm.) E. Murray |
|
| Pinus washoensis H. Mason & Stockw. |
Washoe pine |
| Pinus ponderosa C. Lawson ssp. washoensis (H. Mason & Stockw.) E. Murray |
|
| Piperia Rydb. |
rein orchid |
| Piperia unalascensis (Spreng.) Rydb. |
slender-spire orchid |
| Habenaria unalascensis (Spreng.) S. Watson |
|
| Platanthera cooperi (S. Watson) Rydb. |
|
| Platanthera unalascensis (Spreng.) Kurtz |
|
| Spiranthes unalascensis Spreng. |
|
| Piptatherum P. Beauv. |
ricegrass |
| Piptatherum exiguum (Thurb.) Dorn |
little ricegrass |
| Oryzopsis exigua Thurb. |
|
| Piptatherum micranthum (Trin. & Rupr.) Barkworth |
littleseed ricegrass |
| Oryzopsis micrantha (Trin. & Rupr.) Thurb. |
|
| Piptatherum miliaceum (L.) Coss. |
smilograss |
| Agrostis miliacea L. |
|
| Oryzopsis miliacea (L.) Benth. & Hook. f. ex Asch. & Schweinf. |
|
| Piptatherum shoshoneanum (Curto & Douglass M. Hend.) P. M. Peterson & Soreng |
Shoshone ricegrass |
| Stipa shoshoneana Curto & Douglass M. Hend. |
|
| Plagiobothrys Fisch. & C.A. Mey. |
popcornflower |
| Plagiobothrys arizonicus (A. Gray) Greene ex A. Gray |
Arizona popcornflower |
| Plagiobothrys glomeratus A. Gray |
clustered popcornflower |
| Plagiobothrys hispidus A. Gray |
Cascade popcornflower |
| Plagiobothrys jonesii A. Gray |
Mojave popcornflower |
| Plagiobothrys kingii (S. Watson) A. Gray |
Great Basin popcornflower |
| Plagiobothrys kingii (S. Watson) A. Gray var. harknessii (Greene) Jeps. |
Harness' popcornflower |
| Plagiobothrys harknessii Greene |
|
| Plagiobothrys kingii (S. Watson) A. Gray var. kingii |
Great Basin popcornflower |
| Plagiobothrys leptocladus (Greene) I.M. Johnst. |
finebranched popcornflower |
| Allocarya leptoclada Greene |
|
| Plagiobothrys orthocarpus (Greene) I.M. Johnst. |
|
| Plagiobothrys mollis (A. Gray) I.M. Johnst. |
soft popcornflower |
| Plagiobothrys mollis (A. Gray) I.M. Johnst. var. mollis |
soft popcornflower |
| Allocarya mollis (A. Gray) Greene |
|
| Plagiobothrys nothofulvus (A. Gray) A. Gray |
rusty popcornflower |
| Plagiobothrys salsus (Brandegee) I.M. Johnst. |
salty popcornflower |
| Allocarya salsa Brandegee |
|
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. |
Scouler's popcornflower |
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. cusickii (Greene) Higgins |
Cusick's popcornflower |
| Allocarya cusickii Greene |
|
| Plagiobothrys cusickii (Greene) I.M. Johnst. |
|
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. hispidulus (Greene) Dorn |
sleeping popcornflower |
| Allocarya cognata Greene |
|
| Allocarya hispidula Greene |
|
| Allocarya scopulorum Greene |
|
| Plagiobothrys cognatus (Greene) I.M. Johnst. |
|
| Plagiobothrys hispidulus (Greene) I.M. Johnst. |
|
| Plagiobothrys nelsonii (Greene) I.M. Johnst. |
|
| Plagiobothrys scopulorum (Greene) I.M. Johnst. |
|
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. ssp. penicillatus (Greene) A. Löve |
|
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. penicillatus (Greene) Cronquist |
|
| Plagiobothrys stipitatus (Greene) I.M. Johnst. |
stalked popcornflower |
| Plagiobothrys stipitatus (Greene) I.M. Johnst. var. micranthus (Piper) I.M. Johnst. |
stalked popcornflower |
| Allocarya stipitata Greene ssp. micrantha Piper |
|
| Plagiobothrys tenellus (Nutt. ex Hook.) A. Gray |
Pacific popcornflower |
| Plagiobothrys asper Greene |
|
| Plagiobothrys torreyi (A. Gray) A. Gray |
Torrey's popcornflower |
| Plagiobothrys torreyi (A. Gray) A. Gray var. diffusus (Greene) I.M. Johnst. |
Torrey's popcornflower |
| Allocarya diffusa Greene |
|
| Plagiobothrys diffusus (Greene) I.M. Johnst. |
|
| Plantago L. |
plantain |
| Plantago eriopoda Torr. |
redwool plantain |
| Plantago shastensis Greene |
|
| Plantago lanceolata L. |
narrowleaf plantain |
| Plantago altissima auct. non L. |
|
| Plantago lanceolata L. var. sphaerostachya Mert. & W.D.J. Koch |
|
| Plantago major L. |
common plantain |
| Plantago asiatica auct. non L. |
|
| Plantago halophila E.P. Bicknell |
|
| Plantago major L. ssp. intermedia (DC.) Arcang. |
|
| Plantago major L. var. asiatica auct. non (L.) Decne. |
|
| Plantago major L. var. intermedia (DC.) Pilg. |
|
| Plantago major L. var. pachyphylla Pilg. |
|
| Plantago major L. var. pilgeri Domin |
|
| Plantago major L. var. scopulorum Fr. & Broberg |
|
| Plantago ovata Forssk. |
desert Indianwheat |
| Plantago brunnea Morris |
|
| Plantago fastigiata Morris |
|
| Plantago gooddingii A. Nelson & Kennedy |
|
| Plantago insularis Eastw. |
|
| Plantago insularis Eastw. var. fastigiata (Morris) Jeps. |
|
| Plantago insularis Eastw. var. scariosa (Morris) Jeps. |
|
| Plantago minima A. Cunn. |
|
| Plantago patagonica Jacq. |
woolly plantain |
| Plantago patagonica Jacq. var. breviscapa (Shinners) Shinners |
|
| Plantago patagonica Jacq. var. gnaphalioides (Nutt.) A. Gray |
|
| Plantago patagonica Jacq. var. oblonga (Morris) Shinners |
|
| Plantago patagonica Jacq. var. spinulosa (Decne.) A. Gray |
|
| Plantago picta E. Morris |
|
| Plantago purshii Roem. & Schult. |
|
| Plantago purshii Roem. & Schult. var. breviscapa Shinners |
|
| Plantago purshii Roem. & Schult. var. oblonga (Morris) Shinners |
|
| Plantago purshii Roem. & Schult. var. picta (E. Morris) Pilg. |
|
| Plantago purshii Roem. & Schult. var. spinulosa (Decne.) Shinners |
|
| Plantago spinulosa Decne. |
|
| Plantago wyomingensis Gandog. |
|
| Platanthera Rich. |
fringed orchid |
| Platanthera aquilonis Sheviak |
northern green orchid |
| Habenaria hyperborea auct. non (L.) R. Br. |
|
| Platanthera hyperborea auct. non (L.) Lindl. |
|
| Platanthera dilatata (Pursh) Lindl. ex Beck |
scentbottle |
| Platanthera dilatata (Pursh) Lindl. ex Beck var. dilatata |
scentbottle |
| Habenaria dilatata (Pursh) Hook. |
|
| Limnorchis dilatata (Pursh) Rydb. |
|
| Platanthera dilatata (Pursh) Lindl. ex Beck var. angustifolia Hook. |
|
| Platanthera dilatata (Pursh) Lindl. ex Beck var. leucostachys (Lindl.) Luer |
Sierra bog orchid |
| Habenaria dilatata (Pursh) Hook. var. leucostachys (Lindl.) Ames |
|
| Habenaria leucostachys (Lindl.) S. Watson |
|
| Limnorchis graminifolia Rydb. |
|
| Platanthera leucostachys Lindl. |
|
| Platanthera gracilis Lindl. |
lax-flowered green orchid |
| Habenaria sparsiflora S. Watson var. laxiflora (Rydb.) Correll |
|
| Platanthera hyperborea (L.) Lindl. var. gracilis (Lindl.) Luer |
|
| Platanthera sparsiflora (S. Watson) Schltr. |
sparse-flowered bog orchid |
| Platanthera sparsiflora (S. Watson) Schltr. var. ensifolia (Rydb.) Luer |
sparse-flowered bog orchid |
| Limnorchis ensifolia Rydb. |
|
| Platanthera sparsiflora (S. Watson) Schltr. var. sparsiflora |
sparse-flowered bog orchid |
| Habenaria sparsiflora S. Watson |
|
| Limnorchis sparsiflora (S. Watson) Rydb. |
|
| Platanthera stricta Lindl. |
slender bog orchid |
| Habenaria hyperborea (L.) R. Br. var. viridiflora (Cham.) S.L. Welsh |
|
| Habenaria saccata Greene |
|
| Habenaria stricta (Lindl.) Rydb. |
|
| Limnorchis saccata (Greene) A. Löve & Simon |
|
| Limnorchis stricta (Lindl.) Rydb. |
|
| Limnorchis viridiflora (Cham.) Rydb. |
|
| Platanthera convallariifolia (Fisch.) Lindl. |
|
| Platanthera dilatata (Pursh) Lindl. ex Beck var. gracilis Ledeb. |
|
| Platanthera hyperborea (L.) Lindl. var. viridiflora (Cham.) Luer |
|
| Platanthera saccata (Greene) Hultén |
|
| Plectritis (Lindl.) DC. |
seablush |
| Plectritis macrocera Torr. & A. Gray |
longhorn plectritis |
| Plectritis macrocera Torr. & A. Gray ssp. grayi (Suksd.) Morey |
Gray's seablush |
| Plectritis macrocera Torr. & A. Gray var. grayi (Suksd.) Dyal |
|
| Plectritis macrocera Torr. & A. Gray var. mamillata (Suksd.) Dyal |
|
| Plectritis macrocera Torr. & A. Gray ssp. macrocera |
longhorn plectritis |
| Plectritis eichleriana (Suksd.) A. Heller |
|
| Plectritis jepsonii (Suksd.) Burtt Davy |
|
| Plectritis macrocera Torr. & A. Gray var. collina (A. Heller) Dyal |
|
| Plectritis macrocera Torr. & A. Gray var. macroptera Suksd. |
|
| Plectritis macroptera (Suksd.) Rydb. |
|
| Pleiacanthus Rydb. |
|
| Pleiacanthus spinosus (Nutt.) Rydb. |
thorn skeletonweed |
| Lygodesmia spinosa Nutt. |
|
| Stephanomeria spinosa (Nutt.) S. Tomb |
|
| Pleuraphis Torr. |
galleta grass |
| Pleuraphis jamesii Torr. |
James' galleta |
| Hilaria jamesii (Torr.) Benth. |
|
| Pleuraphis rigida Thurb. |
big galleta |
| Hilaria rigida (Thurb.) Benth. ex Scribn. |
|
| Pleurocoronis King & H. Rob. |
pleurocoronis |
| Pleurocoronis pluriseta (A. Gray) King & H. Rob. |
bush arrowleaf |
| Hofmeisteria pluriseta A. Gray |
|
| Pluchea Cass. |
camphorweed |
| Pluchea odorata (L.) Cass. |
sweetscent |
| Pluchea odorata (L.) Cass. var. odorata |
sweetscent |
| Conyza odorata L. |
|
| Pluchea purpurascens (Sw.) DC. |
|
| Pluchea sericea (Nutt.) Coville |
arrowweed |
| Berthelotia sericea (Nutt.) Rydb. |
|
| Polypappus sericeus Nutt. |
|
| Tessaria sericea (Nutt.) Shinners |
|
| Poa L. |
bluegrass |
| Poa abbreviata R. Br. |
short bluegrass |
| Poa abbreviata R. Br. ssp. marshii Soreng |
Marsh's bluegrass |
| Poa abbreviata R. Br. ssp. pattersonii (Vasey) A. Löve & D. Löve & Kapoor |
Patterson's bluegrass |
| Poa abbreviata R. Br. ssp. jordalii (A.E. Porsild) Hultén |
|
| Poa abbreviata R. Br. var. jordalii (A.E. Porsild) B. Boivin |
|
| Poa jordalii A.E. Porsild |
|
| Poa pattersonii Vasey |
|
| Poa alpina L. |
alpine bluegrass |
| Poa alpina L. ssp. vivipara (L.) Arcang. |
|
| Poa alpina L. var. vivipara L. |
|
| Poa vivipara (L.) Willd. |
|
| Poa annua L. |
annual bluegrass |
| Poa annua L. var. aquatica Asch. |
|
| Poa annua L. var. reptans Hausskn. |
|
| Poa arctica R. Br. |
arctic bluegrass |
| Poa arctica R. Br. ssp. arctica |
arctic bluegrass |
| Poa arctica R. Br. ssp. longiculmis Hultén |
|
| Poa arctica R. Br. ssp. williamsii (Nash) Hultén |
|
| Poa arctica R. Br. var. glabriflora Rosh. |
|
| Poa arctica R. Br. var. vivipara Hook. |
|
| Poa cenisia All. var. arctica (R. Br.) K. Richt. |
|
| Poa longipila Nash |
|
| Poa williamsii Nash |
|
| Poa bigelovii Vasey & Scribn. |
Bigelow's bluegrass |
| Poa bolanderi Vasey |
Bolander's bluegrass |
| Poa horneri H. St. John |
|
| Poa bulbosa L. |
bulbous bluegrass |
| Poa compressa L. |
Canada bluegrass |
| Poa cusickii Vasey |
Cusick's bluegrass |
| Poa cusickii Vasey ssp. cusickii |
Cusick's bluegrass |
| Poa cusickii Vasey var. cusickii |
|
| Poa filifolia Vasey |
|
| Poa hansenii Scribn. |
|
| Poa cusickii Vasey ssp. epilis (Scribn.) W.A. Weber |
Cusick's bluegrass |
| Poa cusickii Vasey var. epilis (Scribn.) C.L. Hitchc. |
|
| Poa epilis Scribn. |
|
| Poa cusickii Vasey ssp. pallida Soreng |
Cusick's bluegrass |
| Poa cusickii Vasey var. pallida (Soreng) Dorn |
|
| Poa fendleriana (Steud.) Vasey |
muttongrass |
| Poa fendleriana (Steud.) Vasey ssp. fendleriana |
muttongrass |
| Poa fendleriana (Steud.) Vasey ssp. longiligula (Scribn. & T.A. Williams) Soreng |
muttongrass |
| Poa fendleriana (Steud.) Vasey var. longiligula (Scribn. & T.A. Williams) Gould |
|
| Poa longiligula Scribn. & T.A. Williams |
|
| Poa glauca Vahl |
glaucous bluegrass |
| Poa glauca Vahl ssp. rupicola (Nash ex Rydb.) W.A. Weber |
timberline bluegrass |
| Poa glauca Vahl var. rupicola (Nash ex Rydb.) B. Boivin |
|
| Poa rupicola Nash ex Rydb. |
|
| Poa leptocoma Trin. |
marsh bluegrass |
| Poa leptocoma Trin. ssp. leptocoma |
|
| Poa lettermanii Vasey |
Letterman's bluegrass |
| Poa montevansii L. Kelso |
|
| Puccinellia lettermanii (Vasey) Ponert |
|
| Poa nemoralis L. |
wood bluegrass |
| Poa nemoralis L. ssp. interior (Rydb.) W.A. Weber |
inland bluegrass |
| Poa interior Rydb. |
|
| Poa nemoralis L. var. interior (Rydb.) Butters & Abbe |
|
| Poa palustris L. |
fowl bluegrass |
| Poa crocata Michx. |
|
| Poa eyerdamii Hultén |
|
| Poa triflora Gilib. |
|
| Poa pratensis L. |
Kentucky bluegrass |
| Poa pratensis L. ssp. pratensis |
Kentucky bluegrass |
| Poa agassizensis B. Boivin & D. Löve |
|
| Poa angustifolia L. |
|
| Poa pratensis L. ssp. agassizensis (B. Boivin & D. Löve) Roy L. Taylor & MacBryde |
|
| Poa pratensis L. ssp. angustifolia (L.) Lej. |
|
| Poa pratensis L. var. angustifolia (L.) Gaudin |
|
| Poa pratensis L. var. domestica Laest. |
|
| Poa pratensis L. var. gelida (Roem. & Schult.) Böcher |
|
| Poa pratensis L. var. iantha Wahlenb. |
|
| Poa pringlei Scribn. |
Pringle's bluegrass |
| Poa reflexa Vasey & Scribn. ex Vasey |
nodding bluegrass |
| Poa leptocoma Trin. var. reflexa (Vasey & Scribn. ex Vasey) M.E. Jones |
|
| Poa secunda J. Presl |
Sandberg bluegrass |
| Festuca oregona Vasey |
|
| Poa ampla Merr. |
|
| Poa brachyglossa Piper |
|
| Poa buckleyana Nash |
|
| Poa canbyi (Scribn.) Howell |
|
| Poa confusa Rydb. |
|
| Poa englishii H. St. John & Hardin |
|
| Poa gracillima Vasey |
|
| Poa gracillima Vasey var. multnomae (Piper) C.L. Hitchc. |
|
| Poa incurva Scribn. & T.A. Williams |
|
| Poa juncifolia Scribn. |
|
| Poa juncifolia Scribn. ssp. porteri D.D. Keck |
|
| Poa juncifolia Scribn. var. ampla (Merr.) Dorn |
|
| Poa juncifolia Scribn. var. juncifolia |
|
| Poa laevigata Scribn. |
|
| Poa nevadensis Vasey ex Scribn. |
|
| Poa nevadensis Vasey ex Scribn. var. juncifolia (Scribn.) Beetle |
|
| Poa orcuttiana Vasey |
|
| Poa sandbergii Vasey |
|
| Poa scabrella (Thurb.) Benth. ex Vasey |
|
| Poa secunda J. Presl ssp. juncifolia (Scribn.) Soreng |
|
| Poa secunda J. Presl ssp. secunda |
|
| Poa secunda J. Presl var. elongata (Vasey) Dorn |
|
| Poa secunda J. Presl var. incurva (Scribn. & T.A. Williams) Beetle |
|
| Poa secunda J. Presl var. stenophylla (Vasey) Beetle |
|
| Poa stenantha Trin. var. sandbergii (Vasey) B. Boivin |
|
| Poa trivialis L. |
rough bluegrass |
| Poa attica Boiss. & Heldr. |
|
| Poa wheeleri Vasey |
Wheeler's bluegrass |
| Poa nervosa (Hook.) Vasey var. wheeleri (Vasey) C.L. Hitchc. |
|
| Polanisia Raf. |
clammyweed |
| Polanisia dodecandra (L.) DC. |
redwhisker clammyweed |
| Polanisia dodecandra (L.) DC. ssp. dodecandra |
redwhisker clammyweed |
| Polanisia graveolens Raf. |
|
| Polanisia dodecandra (L.) DC. ssp. trachysperma (Torr. & A. Gray) Iltis |
sandyseed clammyweed |
| Polanisia dodecandra (L.) DC. var. trachysperma (Torr. & A. Gray) Iltis |
|
| Polanisia trachysperma Torr. & A. Gray |
|
| Polemonium L. |
Jacob's-ladder |
| Polemonium californicum Eastw. |
moving polemonium |
| Polemonium columbianum Rydb. |
|
| Polemonium pulcherrimum Hook. ssp. tricolor (Eastw.) Brand |
|
| Polemonium pulcherrimum Hook. var. calycinum (Eastw.) Brand |
|
| Polemonium chartaceum H. Mason |
Mason's Jacob's-ladder |
| Polemonium foliosissimum A. Gray |
towering Jacob's-ladder |
| Polemonium foliosissimum A. Gray var. alpinum Brand |
alpine Jacob's-ladder |
| Polemonium foliosissimum A. Gray ssp. albiflorum (Eastw.) Brand |
|
| Polemonium foliosissimum A. Gray ssp. decurrens (Brand) Wherry |
|
| Polemonium micranthum Benth. |
annual polemonium |
| Polemoniella micrantha (Benth.) A. Heller |
|
| Polemonium nevadense Wherry |
Nevada Jacob's-ladder |
| Polemonium occidentale Greene |
western polemonium |
| Polemonium occidentale Greene ssp. occidentale |
western polemonium |
| Polemonium caeruleum L. ssp. amygdalium (Wherry) Munz |
|
| Polemonium caeruleum L. ssp. occidentale (Greene) J.F. Davids. |
|
| Polemonium caeruleum L. var. pterospermum Benth. |
|
| Polemonium helleri Brand |
|
| Polemonium intermedium (Brand) Rydb. |
|
| Polemonium occidentale Greene ssp. amygdalium Wherry |
|
| Polemonium occidentale Greene ssp. typicum Wherry |
|
| Polemonium pulcherrimum Hook. |
Jacob's-ladder |
| Polemonium pulcherrimum Hook. ssp. delicatum (Rydb.) Brand |
Jacob's-ladder |
| Polemonium delicatum Rydb. |
|
| Polemonium delicatum Rydb. ssp. scopulinum (Greene) Wherry |
|
| Polemonium delicatum Rydb. ssp. typicum Wherry |
|
| Polemonium pulcherrimum Hook. var. delicatum (Rydb.) Cronquist |
|
| Polemonium pulcherrimum Hook. ssp. pulcherrimum |
Jacob's-ladder |
| Polemonium berryi Eastw. |
|
| Polemonium haydenii A. Nelson |
|
| Polemonium pilosum (Greenm.) G.N. Jones |
|
| Polemonium pulcherrimum Hook. var. pilosum (Greenm.) J.F. Davids. |
|
| Polemonium pulcherrimum Hook. var. pulcherrimum |
|
| Polemonium shastense Baker ex Eastw. |
|
| Polemonium viscosum Nutt. |
sticky polemonium |
| Polemonium viscosum Nutt. ssp. genuinum Wherry |
|
| Polemonium viscosum Nutt. ssp. lemmonii (Brand) Wherry |
|
| Polyctenium Greene |
combleaf |
| Polyctenium fremontii (S. Watson) Greene |
desert combleaf |
| Polyctenium fremontii (S. Watson) Greene var. fremontii |
Fremont's combleaf |
| Smelowskia fremontii S. Watson |
|
| Polyctenium williamsiae Rollins |
Washoe combleaf |
| Polyctenium fremontii (S. Watson) Greene var. confertum Rollins |
|
| Polygala L. |
polygala |
| Polygala heterorhyncha (Barneby) T. Wendt |
beaked spiny polygala |
| Polygala subspinosa S. Watson var. heterorhyncha Barneby |
|
| Polygala intermontana T. Wendt |
Intermountain milkwort |
| Polygala acanthoclada A. Gray var. intricata Eastw. |
|
| Polygala subspinosa S. Watson |
spiny milkwort |
| Polygonum L. |
knotweed |
| Polygonum amphibium L. |
water knotweed |
| Polygonum amphibium L. var. emersum Michx. |
longroot smartweed |
| Persicaria amphibia (L.) Gray p.p. |
|
| Persicaria amphibia (L.) Gray var. emersa (Michx.) J.C. Hickman |
|
| Persicaria coccinea (Muhl. ex Willd.) Greene |
|
| Persicaria muehlenbergii (S. Watson) Small |
|
| Polygonum amphibium L. var. coccineum (Muhl. ex Willd.) Farw. |
|
| Polygonum coccineum Muhl. ex Willd. |
|
| Polygonum coccineum Muhl. ex Willd. var. pratincola (Greene) Stanford |
|
| Polygonum coccineum Muhl. ex Willd. var. terrestre Willd. |
|
| Polygonum muehlenbergii S. Watson |
|
| Polygonum muehlenbergii S. Watson var. terrestre (Willd.) Trel. |
|
| Polygonum amphibium L. var. stipulaceum Coleman |
water smartweed |
| Persicaria amphibia (L.) Gray var. stipulacea (N. Coleman) H. Hara |
|
| Persicaria mesochora Greene |
|
| Persicaria nebraskensis Greene |
|
| Polygonum amphibium L. ssp. laevimarginatum Hultén |
|
| Polygonum amphibium L. var. hartwrightii (A. Gray) Bissell |
|
| Polygonum coccineum Muhl. ex Willd. var. rigidulum (Sheldon) Stanford |
|
| Polygonum fluitans Eaton |
|
| Polygonum hartwrightii A. Gray |
|
| Polygonum inundatum Raf. |
|
| Polygonum natans Eaton |
|
| Polygonum arenastrum Jord. ex Boreau |
oval-leaf knotweed |
| Polygonum aequale Lindm. |
|
| Polygonum aviculare L. var. arenastrum (Jord. ex Boreau) Rouy |
|
| Polygonum montereyense Brenckle |
|
| Polygonum argyrocoleon Steud. ex Kunze |
silversheath knotweed |
| Polygonum aviculare L. |
prostrate knotweed |
| Polygonum aviculare L. var. vegetum Ledeb. |
|
| Polygonum heterophyllum Lindl. |
|
| Polygonum monspeliense Pers. |
|
| Polygonum bistortoides Pursh |
American bistort |
| Bistorta bistortoides (Pursh) Small |
|
| Persicaria bistortoides (Pursh) H. Hinds |
|
| Polygonum bistortoides Pursh var. linearifolium (S. Watson) Small |
|
| Polygonum bistortoides Pursh var. oblongifolium (Meisn.) H. St. John |
|
| Polygonum cephalophorum Greene |
|
| Polygonum glastifolium Greene |
|
| Polygonum vulcanicum Greene |
|
| Polygonum convolvulus L. |
black bindweed |
| Polygonum convolvulus L. var. convolvulus |
black bindweed |
| Bilderdykia convolvulus (L.) Dumort. |
|
| Fallopia convolvulus (L.) A. Löve |
|
| Reynoutria convolvulus (L.) Shinners |
|
| Tiniaria convolvulus (L.) Webb & Moq. |
|
| Polygonum douglasii Greene |
Douglas' knotweed |
| Polygonum douglasii Greene ssp. austiniae (Greene) E. Murray |
Austin knotweed |
| Polygonum austiniae Greene |
|
| Polygonum douglasii Greene var. austiniae (Greene) M.E. Jones |
|
| Polygonum douglasii Greene ssp. douglasii |
Douglas' knotweed |
| Polygonum buxiforme Small var. montanum (Small) R.J. Davis |
|
| Polygonum douglasii Greene var. latifolium (Engelm.) Greene |
|
| Polygonum emaciatum A. Nelson |
|
| Polygonum montanum Small |
|
| Polygonum douglasii Greene ssp. engelmannii (Greene) Kartesz & Gandhi |
Engelmann's knotweed |
| Polygonum douglasii Greene var. microspermum (Engelm.) Dorn |
|
| Polygonum engelmannii Greene |
|
| Polygonum microspermum (Engelm.) Small |
|
| Polygonum tenue Michx. var. microspermum Engelm. |
|
| Polygonum douglasii Greene ssp. johnstonii (Munz) J.C. Hickman |
Johnston's knotweed |
| Polygonum douglasii Greene var. johnstonii Munz |
|
| Polygonum sawatchense Small |
|
| Polygonum sawatchense Small ssp. oblivium Costea & Tardif |
|
| Polygonum triandrum Coolidge |
|
| Polygonum utahense Brenckle & Cottam |
|
| Polygonum douglasii Greene ssp. majus (Meisn.) J.C. Hickman |
large knotweed |
| Polygonum coarctatum Douglas ex Hook. f. var. majus Meisn. |
|
| Polygonum majus (Meisn.) Piper |
|
| Polygonum erectum L. |
erect knotweed |
| Polygonum aviculare L. var. erectum (L.) Roth ex Meisn. |
|
| Polygonum heterosepalum M. Peck & Ownbey |
oddsepal knotweed |
| Polygonum hydropiper L. |
marshpepper knotweed |
| Persicaria hydropiper (L.) Opiz |
|
| Polygonum hydropiper L. var. projectum Stanford |
|
| Polygonum hydropiperoides Michx. |
swamp smartweed |
| Persicaria hydropiperoides (Michx.) Small |
|
| Persicaria hydropiperoides (Michx.) Small var. breviciliata (Fernald) C.F. Reed |
|
| Persicaria hydropiperoides (Michx.) Small var. euronotora (Fernald) C.F. Reed |
|
| Persicaria hydropiperoides (Michx.) Small var. opelousana (Riddell ex Small) J.S. Wilson |
|
| Persicaria opelousana (Riddell ex Small) Small |
|
| Persicaria paludicola Small |
|
| Persicaria persicarioides (Kunth) Small |
|
| Polygonum hydropiperoides Michx. var. adenocalyx (Stanford) Gleason |
|
| Polygonum hydropiperoides Michx. var. asperifolium Stanford |
|
| Polygonum hydropiperoides Michx. var. breviciliatum Fernald |
|
| Polygonum hydropiperoides Michx. var. bushianum Stanford |
|
| Polygonum hydropiperoides Michx. var. digitatum Fernald |
|
| Polygonum hydropiperoides Michx. var. euronotorum Fernald |
|
| Polygonum hydropiperoides Michx. var. opelousanum (Riddell ex Small) Riddell ex W. Stone |
|
| Polygonum hydropiperoides Michx. var. psilostachyum H. St. John |
|
| Polygonum hydropiperoides Michx. var. strigosum (Small) Stanford |
|
| Polygonum opelousanum Riddell ex Small |
|
| Polygonum opelousanum Riddell ex Small var. adenocalyx Stanford |
|
| Polygonum persicarioides Kunth |
|
| Polygonum lapathifolium L. |
curlytop knotweed |
| Persicaria incarnata (Elliot) Small |
|
| Persicaria lapathifolia (L.) Gray |
|
| Persicaria tomentosa (Schrank) E.P. Bicknell |
|
| Polygonum incanum F.W. Schmidt |
|
| Polygonum incarnatum Elliot |
|
| Polygonum lapathifolium L. ssp. pallidum (With.) Fr. |
|
| Polygonum lapathifolium L. var. incanum (F.W. Schmidt) W.D.J. Koch |
|
| Polygonum lapathifolium L. var. nodosum (Pers.) Small |
|
| Polygonum lapathifolium L. var. ovatum A. Braun |
|
| Polygonum lapathifolium L. var. prostratum Wimm. |
|
| Polygonum lapathifolium L. var. salicifolium Sibth. |
|
| Polygonum nodosum Pers. |
|
| Polygonum oneillii Brenckle |
|
| Polygonum pensylvanicum L. ssp. oneillii (Brenckle) Hultén |
|
| Polygonum scabrum Moench |
|
| Polygonum tomentosum Schrank |
|
| Polygonum minimum S. Watson |
broadleaf knotweed |
| Polygonum paronychia Cham. & Schltdl. |
beach knotweed |
| Polygonum pensylvanicum L. |
Pennsylvania smartweed |
| Persicaria bicornis (Raf.) Nieuwl. |
|
| Persicaria longistyla (Small) Small |
|
| Persicaria mississippiensis (Stanford) Small |
|
| Persicaria pensylvanica (L.) Small |
|
| Persicaria pensylvanica (L.) Small var. dura (Stanford) C.F. Reed |
|
| Polygonum bicorne Raf. |
|
| Polygonum longistylum Small |
|
| Polygonum longistylum Small var. omissum (Greene) Stanford |
|
| Polygonum mexicanum auct. non Small |
|
| Polygonum mississippiense Stanford |
|
| Polygonum mississippiense Stanford var. interius Stanford |
|
| Polygonum pensylvanicum L. var. durum Stanford |
|
| Polygonum pensylvanicum L. var. eglandulosum J.C. Myers |
|
| Polygonum pensylvanicum L. var. genuinum Fernald |
|
| Polygonum pensylvanicum L. var. laevigatum Fernald |
|
| Polygonum pensylvanicum L. var. rosiflorum J.B.S. Norton |
|
| Polygonum persicaria L. |
spotted ladysthumb |
| Persicaria maculata (Raf.) Gray |
|
| Persicaria maculosa Gray |
|
| Persicaria persicaria (L.) Small |
|
| Persicaria ruderalis (Salisb.) C.F. Reed |
|
| Persicaria ruderalis (Salisb.) C.F. Reed var. vulgaris (Webb & Moq.) C.F. Reed |
|
| Persicaria vulgaris Webb & Moq. |
|
| Polygonum dubium Stein |
|
| Polygonum fusiforme Greene |
|
| Polygonum minus auct. non Huds. |
|
| Polygonum minus Huds. var. subcontinuum (Meisn.) Fernald |
|
| Polygonum persicaria L. var. angustifolium Beckh. |
|
| Polygonum persicaria L. var. ruderale (Salisb.) Meisn. |
|
| Polygonum puritanorum Fernald |
|
| Polygonum phytolaccifolium Meisn. ex Small |
poke knotweed |
| Aconogonum phytolaccifolium (Meisn. ex Small) Small ex Rydb. |
|
| Aconogonum phytolaccifolium (Meisn. ex Small) Small ex Rydb. var. glabrum S.-P. Hong |
|
| Polygonum polygaloides Wall. ex Meisn. |
milkwort knotweed |
| Polygonum polygaloides Wall. ex Meisn. ssp. confertiflorum (Nutt. ex Piper) J.C. Hickman |
fruitleaf knotweed |
| Polygonum confertiflorum Nutt. ex Piper |
|
| Polygonum imbricatum Nutt. |
|
| Polygonum kelloggii Greene var. confertiflorum (Nutt. ex Piper) Dorn |
|
| Polygonum watsonii Small |
|
| Polygonum polygaloides Wall. ex Meisn. ssp. kelloggii (Greene) J.C. Hickman |
Kellogg's knotweed |
| Polygonum kelloggii Greene |
|
| Polygonum unifolium Greene |
|
| Polygonum ramosissimum Michx. |
bushy knotweed |
| Polygonum ramosissimum Michx. var. ramosissimum |
bushy knotweed |
| Polygonum allocarpum S.F. Blake |
|
| Polygonum atlanticum (B.L. Rob.) E.P. Bicknell p.p. |
|
| Polygonum autumnale Brenckle |
|
| Polygonum exsertum auct. non Small. p.p. |
|
| Polygonum interius Brenckle |
|
| Polygonum triangulum E.P. Bicknell |
|
| Polygonum shastense W.H. Brewer |
Shasta knotweed |
| Polygonum viviparum L. |
alpine bistort |
| Bistorta vivipara (L.) Gray |
|
| Persicaria vivipara (L.) Ronse Decr. |
|
| Polygonum fugax Small |
|
| Polygonum macounii Small ex Macoun |
|
| Polygonum viviparum L. var. alpinum Wahlenb. |
|
| Polygonum viviparum L. var. macounii (Small ex Macoun) Hultén |
|
| Polypogon Desf. |
rabbitsfoot grass |
| Polypogon australis Brongn. |
Chilean rabbitsfoot grass |
| Polypogon interruptus Kunth |
ditch rabbitsfoot grass |
| Polypogon lutosus auct. non (Poir.) Hitchc. |
|
| Polypogon maritimus Willd. |
Mediterranean rabbitsfoot grass |
| Polypogon monspeliensis (L.) Desf. |
annual rabbitsfoot grass |
| Alopecurus monspeliensis L. |
|
| Polypogon viridis (Gouan) Breistr. |
beardless rabbitsfoot grass |
| Agrostis semiverticillata (Forssk.) C. Chr. |
|
| Agrostis verticillata Vill. |
|
| Agrostis viridis Gouan |
|
| Polypogon semiverticillatus (Forssk.) Hyl. |
|
| Polystichum Roth |
hollyfern |
| Polystichum kruckebergii W.H. Wagner |
Kruckeberg's hollyfern |
| Polystichum lonchitis (L.) Roth |
northern hollyfern |
| Polystichum mohrioides (Bory) C. Presl var. lemmonii (Underw.) Fernald |
|
| Polystichum scopulinum (D.C. Eaton) Maxon |
mountain hollyfern |
| Polystichum mohrioides (Bory) C. Presl var. scopulinum (D.C. Eaton) Fernald |
|
| Populus L. |
cottonwood |
| Populus alba L. |
white poplar |
| Populus alba L. var. bolleana Lauche |
|
| Populus alba L. var. nivea Aiton |
|
| Populus alba L. var. pyramidalis Bunge |
|
| Populus angustifolia James |
narrowleaf cottonwood |
| Populus balsamifera L. var. angustifolia (James) S. Watson |
|
| Populus canadensis Moench var. angustifolia (James) Wesmael |
|
| Populus fortissima A. Nelson & J.F. Macbr. |
|
| Populus salicifolia Raf. |
|
| Populus ×sennii B. Boivin |
|
| Populus tweedyi Britton |
|
| Populus balsamifera L. |
balsam poplar |
| Populus balsamifera L. ssp. trichocarpa (Torr. & A. Gray ex Hook.) Brayshaw |
black cottonwood |
| Populus balsamifera L. var. californica S. Watson |
|
| Populus hastata Dode p.p. |
|
| Populus trichocarpa Torr. & A. Gray ex Hook. |
|
| Populus trichocarpa Torr. & A. Gray ex Hook. ssp. hastata (Dode) Dode p.p. |
|
| Populus trichocarpa Torr. & A. Gray ex Hook. var. cupulata S. Watson |
|
| Populus trichocarpa Torr. & A. Gray ex Hook. var. hastata (Dode) A. Henry p.p. |
|
| Populus trichocarpa Torr. & A. Gray ex Hook. var. ingrata (Jeps.) Jeps. |
|
| Populus fremontii S. Watson |
Fremont cottonwood |
| Populus fremontii S. Watson ssp. fremontii |
Fremont cottonwood |
| Populus arizonica Sarg. |
|
| Populus arizonica Sarg. var. jonesii Sarg. |
|
| Populus canadensis Moench var. fremontii (S. Watson) Kuntze |
|
| Populus fremontii S. Watson var. arizonica (Sarg.) Jeps. |
|
| Populus fremontii S. Watson var. macdougalii (Rose) Jeps. |
|
| Populus fremontii S. Watson var. macrodisca Sarg. |
|
| Populus fremontii S. Watson var. pubescens Sarg. |
|
| Populus fremontii S. Watson var. thornberi Sarg. |
|
| Populus fremontii S. Watson var. toumeyi Sarg. |
|
| Populus macdougalii Rose |
|
| Populus ×hinckleyana Correll (pro sp.) [angustifolia × fremontii] |
|
| Populus nigra L. |
Lombardy poplar |
| Populus dilatata Aiton |
|
| Populus italica (Du Roi) Moench |
|
| Populus nigra L. var. italica Du Roi |
|
| Populus ×parryi Sarg. [balsamifera × fremontii] |
|
| Populus tremuloides Michx. |
quaking aspen |
| Populus aurea Tidestr. |
|
| Populus cercidiphylla Britton |
|
| Populus ×polygonifolia Bernard |
|
| Populus tremula L. ssp. tremuloides (Michx.) A. Löve & D. Löve |
|
| Populus tremuloides Michx. var. aurea (Tidestr.) Daniels |
|
| Populus tremuloides Michx. var. cercidiphylla (Britton) Sudw. |
|
| Populus tremuloides Michx. var. intermedia Victorin |
|
| Populus tremuloides Michx. var. magnifica Victorin |
|
| Populus tremuloides Michx. var. rhomboidea Victorin |
|
| Populus tremuloides Michx. var. vancouveriana (Trel.) Sarg. |
|
| Populus vancouveriana Trel. |
|
| Porophyllum Adans. |
poreleaf |
| Porophyllum gracile Benth. |
slender poreleaf |
| Porophyllum caesium Greene |
|
| Porophyllum junciforme Greene |
|
| Porophyllum nodosum M.E. Jones |
|
| Porophyllum putidum A. Nelson |
|
| Porophyllum vaseyi Greene |
|
| Porophyllum pygmaeum Keil & J. Morefield |
dwarf poreleaf |
| Porterella Torr. |
porterella |
| Porterella carnosula (Hook. & Arn.) Torr. |
fleshy porterella |
| Portulaca L. |
purslane |
| Portulaca halimoides L. |
silkcotton purslane |
| Portulaca parvula A. Gray |
|
| Portulaca oleracea L. |
little hogweed |
| Portulaca neglecta Mack. & Bush |
|
| Portulaca oleracea L. ssp. granulatostellulata (Poelln.) Danin & Baker |
|
| Portulaca oleracea L. ssp. impolita Danin & Baker |
|
| Portulaca oleracea L. ssp. nicaraguensis Danin & Baker |
|
| Portulaca oleracea L. ssp. nitida Danin & Baker |
|
| Portulaca oleracea L. ssp. papillatostellulata Danin & Baker |
|
| Portulaca oleracea L. ssp. stellata Danin & Baker |
|
| Portulaca retusa Engelm. |
|
| Potamogeton L. |
pondweed |
| Potamogeton alpinus Balbis |
alpine pondweed |
| Potamogeton alpinus Balbis ssp. tenuifolius (Raf.) Hultén |
|
| Potamogeton alpinus Balbis var. subellipticus (Fernald) Ogden |
|
| Potamogeton alpinus Balbis var. tenuifolius (Raf.) Ogden |
|
| Potamogeton crispus L. |
curly pondweed |
| Potamogeton diversifolius Raf. |
waterthread pondweed |
| Potamogeton capillaceus Poir. p.p. |
|
| Potamogeton capillaceus Poir. var. atripes Fernald |
|
| Potamogeton diversifolius Raf. var. multidenticulatus (Morong) Asch. & Graebn. |
|
| Potamogeton epihydrus Raf. |
ribbonleaf pondweed |
| Potamogeton epihydrus Raf. ssp. nuttallii (Cham. & Schltdl.) Calder & Roy L. Taylor |
|
| Potamogeton epihydrus Raf. var. nuttallii (Cham. & Schltdl.) Fernald |
|
| Potamogeton epihydrus Raf. var. ramosus (Peck) House |
|
| Potamogeton foliosus Raf. |
leafy pondweed |
| Potamogeton foliosus Raf. ssp. foliosus |
leafy pondweed |
| Potamogeton curtissii Morong |
|
| Potamogeton foliosus Raf. var. foliosus |
|
| Potamogeton foliosus Raf. var. genuinus Fernald |
|
| Potamogeton foliosus Raf. var. macellus Fernald |
|
| Potamogeton gramineus L. |
variableleaf pondweed |
| Potamogeton gramineus L. var. graminifolius Fr. |
|
| Potamogeton gramineus L. var. maximus Morong |
|
| Potamogeton gramineus L. var. myriophyllus J.W. Robbins |
|
| Potamogeton gramineus L. var. typicus Ogden |
|
| Potamogeton illinoensis Morong |
Illinois pondweed |
| Potamogeton angustifolius Bercht. & C. Presl |
|
| Potamogeton heterophyllus Schreb. |
|
| Potamogeton lucens auct. non L. |
|
| Potamogeton natans L. |
floating pondweed |
| Potamogeton nodosus Poir. |
longleaf pondweed |
| Potamogeton americanus Cham. & Schltdl. |
|
| Potamogeton fluitans Roth |
|
| Potamogeton pusillus L. |
small pondweed |
| Potamogeton pusillus L. ssp. pusillus |
small pondweed |
| Potamogeton lateralis Morong p.p. |
|
| Potamogeton panormitanus Biv. |
|
| Potamogeton panormitanus Biv. var. major G. Fisch. |
|
| Potamogeton panormitanus Biv. var. minor Biv. |
|
| Potamogeton pusillus L. var. minor (Biv.) Fernald & B.G. Schub. |
|
| Potamogeton pusillus L. var. pusillus |
|
| Potamogeton pusillus L. ssp. tenuissimus (Mert. & W.D.J. Koch) Haynes & C.B. Hellquist |
small pondweed |
| Potamogeton berchtoldii Fieber |
|
| Potamogeton berchtoldii Fieber var. acuminatus Fieber |
|
| Potamogeton berchtoldii Fieber var. colpophilus (Fernald) Fernald |
|
| Potamogeton berchtoldii Fieber var. lacunatus (Hagstr.) Fernald |
|
| Potamogeton berchtoldii Fieber var. mucronatus Fieber |
|
| Potamogeton berchtoldii Fieber var. polyphyllus (Morong) Fernald |
|
| Potamogeton berchtoldii Fieber var. tenuissimus (Mert. & W.D.J. Koch) Fernald |
|
| Potamogeton pusillus L. var. mucronatus (Fieber) Graebn. |
|
| Potamogeton pusillus L. var. tenuissimus Mert. & W.D.J. Koch |
|
| Potamogeton richardsonii (Benn.) Rydb. |
Richardson's pondweed |
| Potamogeton perfoliatus L. ssp. richardsonii (Benn.) Hultén |
|
| Potamogeton perfoliatus L. var. richardsonii Benn. |
|
| Potentilla L. |
cinquefoil |
| Potentilla arguta Pursh |
tall cinquefoil |
| Potentilla arguta Pursh ssp. convallaria (Rydb.) D.D. Keck |
cream cinquefoil |
| Potentilla arguta Pursh var. convallaria (Rydb.) T. Wolf |
|
| Potentilla convallaria Rydb. |
|
| Potentilla basaltica Tiehm & Ertter |
Soldier Meadows cinquefoil |
| Potentilla biennis Greene |
biennial cinquefoil |
| Potentilla bimundorum Soják |
staghorn cinquefoil |
| Potentilla multifida auct. non L. |
|
| Potentilla brevifolia Nutt. ex Torr. & A. Gray |
sparseleaf cinquefoil |
| Potentilla concinna Richardson |
elegant cinquefoil |
| Potentilla concinna Richardson var. concinna |
elegant cinquefoil |
| Potentilla concinna Richardson var. dissecta (S. Watson) B. Boivin |
|
| Potentilla concinna Richardson var. divisa Rydb. |
|
| Potentilla divisa (Rydb.) Rydb. |
|
| Potentilla cottamii N.H. Holmgren |
Pilot Range cinquefoil |
| Potentilla crinita A. Gray |
bearded cinquefoil |
| Potentilla crinita A. Gray var. crinita |
bearded cinquefoil |
| Potentilla vallicola Greene |
|
| Potentilla crinita A. Gray var. lemmonii (S. Watson) Kearney & Peebles |
Lemmon's cinquefoil |
| Ivesia lemmonii S. Watson |
|
| Potentilla lemmonii (S. Watson) Greene |
|
| Potentilla diversifolia Lehm. |
varileaf cinquefoil |
| Potentilla diversifolia Lehm. var. diversifolia |
varileaf cinquefoil |
| Potentilla diversifolia Lehm. ssp. glaucophylla (Lehm.) Lehm. |
|
| Potentilla diversifolia Lehm. var. glaucophylla (Lehm.) S. Watson |
|
| Potentilla glaucophylla Lehm. |
|
| Potentilla drummondii Lehm. |
Drummond's cinquefoil |
| Potentilla drummondii Lehm. ssp. breweri (S. Watson) Ertter |
Drummond's cinquefoil |
| Potentilla breweri S. Watson |
|
| Potentilla breweri S. Watson var. expansa S. Watson |
|
| Potentilla drummondii Lehm. var. breweri (S. Watson) N.H. Holmgren |
|
| Potentilla drummondii Lehm. ssp. bruceae (Rydb.) D.D. Keck |
Drummond's cinquefoil |
| Potentilla drummondii Lehm. var. bruceae (Rydb.) N.H. Holmgren |
|
| Potentilla flabellifolia Hook. ex Torr. & A. Gray |
high mountain cinquefoil |
| Potentilla glandulosa Lindl. |
sticky cinquefoil |
| Potentilla glandulosa Lindl. ssp. glabrata (Rydb.) D.D. Keck |
sticky cinquefoil |
| Potentilla glandulosa Lindl. var. intermedia (Rydb.) C.L. Hitchc. |
|
| Potentilla glandulosa Lindl. ssp. glandulosa |
sticky cinquefoil |
| Drymocallis glandulosa (Lindl.) Rydb. |
|
| Potentilla glandulosa Lindl. ssp. typica D.D. Keck |
|
| Potentilla glandulosa Lindl. var. campanulata C.L. Hitchc. |
|
| Potentilla glandulosa Lindl. var. incisa Lindl. |
|
| Potentilla rhomboidea Rydb. |
|
| Potentilla glandulosa Lindl. ssp. hansenii (Greene) D.D. Keck |
Hansen's cinquefoil |
| Potentilla glandulosa Lindl. ssp. micropetala (Rydb.) D.D. Keck |
smallpetal cinquefoil |
| Potentilla glandulosa Lindl. var. micropetala (Rydb.) S.L. Welsh & B.C. Johnst. |
|
| Potentilla glandulosa Lindl. ssp. nevadensis (S. Watson) D.D. Keck |
Nevada cinquefoil |
| Potentilla glandulosa Lindl. var. austinae Jeps. |
|
| Potentilla glandulosa Lindl. var. nevadensis S. Watson |
|
| Potentilla glandulosa Lindl. ssp. pseudorupestris (Rydb.) D.D. Keck |
sticky cinquefoil |
| Potentilla glandulosa Lindl. var. pseudorupestris (Rydb.) Breitung |
|
| Potentilla glandulosa Lindl. ssp. reflexa (Greene) D.D. Keck |
sticky cinquefoil |
| Potentilla glandulosa Lindl. var. reflexa Greene |
|
| Potentilla reflexa (Greene) Greene |
|
| Potentilla gracilis Douglas ex Hook. |
slender cinquefoil |
| Potentilla gracilis Douglas ex Hook. var. brunnescens (Rydb.) C.L. Hitchc. |
slender cinquefoil |
| Potentilla brunnescens Rydb. |
|
| Potentilla gracilis Douglas ex Hook. var. fastigiata (Nutt.) S. Watson |
slender cinquefoil |
| Potentilla angustata Rydb. |
|
| Potentilla blasckeana Turcz. ex Lehm. |
|
| Potentilla blasckeana Turcz. ex Lehm. var. permollis (Rydb.) Wolf |
|
| Potentilla etomentosa Rydb. |
|
| Potentilla etomentosa Rydb. var. hallii (Rydb.) Abrams |
|
| Potentilla fastigiata Nutt. |
|
| Potentilla glomerata A. Nelson |
|
| Potentilla gracilis Douglas ex Hook. ssp. nuttallii (Lehm.) D.D. Keck |
|
| Potentilla gracilis Douglas ex Hook. var. blasckeana (Turcz. ex Lehm.) Jeps. |
|
| Potentilla gracilis Douglas ex Hook. var. glabrata (Lehm.) C.L. Hitchc. |
|
| Potentilla gracilis Douglas ex Hook. var. nuttallii (Lehm.) Sheldon |
|
| Potentilla gracilis Douglas ex Hook. var. permollis (Rydb.) C.L. Hitchc. |
|
| Potentilla gracilis Douglas ex Hook. var. rigida S. Watson |
|
| Potentilla indiges M. Peck |
|
| Potentilla jucunda A. Nelson |
|
| Potentilla nuttallii Lehm. |
|
| Potentilla permollis Rydb. |
|
| Potentilla rectiformis Rydb. |
|
| Potentilla viridescens Rydb. |
|
| Potentilla gracilis Douglas ex Hook. var. flabelliformis (Lehm.) Nutt. ex Torr. & A. Gray |
slender cinquefoil |
| Potentilla flabelliformis Lehm. |
|
| Potentilla hippiana Lehm. |
woolly cinquefoil |
| Potentilla hippiana Lehm. var. hippiana |
woolly cinquefoil |
| Potentilla hippiana Lehm. var. diffusa A. Gray ex Lehm. |
|
| Potentilla leneophylla Torr. & James ex Eaton |
|
| Potentilla leucophylla Torr., non Pall. |
|
| Potentilla propinqua (Rydb.) Rydb. |
|
| Potentilla millefolia Rydb. |
cutleaf cinquefoil |
| Potentilla millefolia Rydb. var. millefolia |
cutleaf cinquefoil |
| Potentilla multisecta (S. Watson) Rydb. |
featherleaf cinquefoil |
| Potentilla diversifolia Lehm. var. multisecta S. Watson |
|
| Potentilla newberryi A. Gray |
Newberry's cinquefoil |
| Potentilla nivea L. |
snow cinquefoil |
| Potentilla nivea L. var. pentaphylla Lehm. |
fiveleaf cinquefoil |
| Potentilla altaica Bunge |
|
| Potentilla nivea L. ssp. chionodes Hiitonen |
|
| Potentilla nivea L. ssp. subquinata (Lange) Hultén |
|
| Potentilla nivea L. var. macrophylla Ser. |
|
| Potentilla nivea L. var. subquinata Lange |
|
| Potentilla quinquefolia (Rydb.) Rydb. |
|
| Potentilla norvegica L. |
Norwegian cinquefoil |
| Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. |
Norwegian cinquefoil |
| Potentilla monspeliensis L. |
|
| Potentilla norvegica L. ssp. hirsuta (Michx.) Hyl. |
|
| Potentilla norvegica L. var. hirsuta (Michx.) Lehm. |
|
| Potentilla norvegica L. var. labradorica (Lehm.) Fernald |
|
| Potentilla ovina Macoun ex J.M. Macoun |
sheep cinquefoil |
| Potentilla ovina Macoun ex J.M. Macoun var. decurrens (S. Watson) S.L. Welsh & B.C. Johnst. |
sheep cinquefoil |
| Potentilla dissecta Pursh var. decurrens S. Watson |
|
| Potentilla nelsoniana Rydb. |
|
| Potentilla ovina Macoun ex J.M. Macoun var. ovina |
sheep cinquefoil |
| Potentilla ovina Macoun ex J.M. Macoun var. pinnatisecta S. Watson |
|
| Potentilla wyomingensis A. Nelson |
|
| Potentilla pectinisecta Rydb. |
combleaf cinquefoil |
| Potentilla gracilis Douglas ex Hook. var. elmeri (Rydb.) Jeps. |
|
| Potentilla pensylvanica L. |
Pennsylvania cinquefoil |
| Potentilla pensylvanica L. var. pensylvanica |
Pennsylvania cinquefoil |
| Potentilla atrovirens Rydb. |
|
| Potentilla bipinnatifida Douglas ex Hook. var. glabrata (Lehm. ex Hook.) Kohli & Packer |
|
| Potentilla glabella Rydb. |
|
| Potentilla pensylvanica L. var. atrovirens (Rydb.) T. Wolf |
|
| Potentilla pensylvanica L. var. glabrata (Lehm. ex Hook.) S. Watson |
|
| Potentilla pensylvanica L. var. ovium Jeps. |
|
| Potentilla pensylvanica L. var. strigosa Pall. ex Pursh |
|
| Potentilla platyloba Rydb. |
|
| Potentilla pseudosericea auct. non Rydb. |
|
| Potentilla strigosa (Pall. ex Pursh) Pall. ex Tratt. |
|
| Potentilla pseudosericea Rydb. |
silky cinquefoil |
| Potentilla pulcherrima Lehm. |
beautiful cinquefoil |
| Potentilla camporum Rydb. |
|
| Potentilla gracilis Douglas ex Hook. var. pulcherrima (Lehm.) Fernald |
|
| Potentilla recta L. |
sulphur cinquefoil |
| Potentilla recta L. var. obscura (Nestler) W.D.J. Koch |
|
| Potentilla recta L. var. pilosa (Willd.) Ledeb. |
|
| Potentilla recta L. var. sulphurea (Lam. & DC.) Peyr. |
|
| Potentilla rivalis Nutt. |
brook cinquefoil |
| Potentilla leucocarpa Rydb. |
|
| Potentilla millegrana Engelm. ex Lehm. |
|
| Potentilla pentandra Engelm. |
|
| Potentilla rivalis Nutt. var. millegrana (Engelm. ex Lehm.) S. Watson |
|
| Potentilla rivalis Nutt. var. pentandra (Engelm.) S. Watson |
|
| Potentilla rivalis Nutt. var. rivalis |
|
| Potentilla rubricaulis Lehm. |
Rocky Mountain cinquefoil |
| Potentilla concinna Richardson var. modesta (Rydb.) S.L. Welsh & B.C. Johnst. |
|
| Potentilla modesta Rydb. |
|
| Potentilla paucijuga Rydb. |
|
| Potentilla pensylvanica L. var. paucijuga (Rydb.) S.L. Welsh & B.C. Johnst. |
|
| Potentilla pensylvanica L. var. virgulata (A. Nelson) T. Wolf |
|
| Potentilla rubricaulis Lehm. var. dasyphylla Ledeb. |
|
| Potentilla rubricaulis Lehm. var. pedersenii Rydb. |
|
| Potentilla saximontana Rydb. |
|
| Potentilla virgulata A. Nelson |
|
| Prenanthella Rydb. |
prenanthella |
| Prenanthella exigua (A. Gray) Rydb. |
brightwhite |
| Lygodesmia exigua (A. Gray) A. Gray |
|
| Primula L. |
primrose |
| Primula capillaris N.H. Holmgren & A.H. Holmgren |
Ruby Mountain primrose |
| Primula cusickiana (A. Gray) A. Gray |
Cusick's primrose |
| Primula cusickiana (A. Gray) A. Gray var. cusickiana |
Cusick's primrose |
| Primula brodheadiae M.E. Jones |
|
| Primula cusickiana (A. Gray) A. Gray var. nevadensis (N.H. Holmgren) N.H. Holmgren & S. Kelso |
Nevada primrose |
| Primula nevadensis N.H. Holmgren |
|
| Primula parryi A. Gray |
Parry's primrose |
| Proboscidea Schmidel |
unicorn-plant |
| Proboscidea louisianica (Mill.) Thell. |
ram's horn |
| Proboscidea louisiana (Mill.) Woot. & Standl., orth. var. |
|
| Proboscidea louisianica (Mill.) Thell. ssp. louisianica |
ram's horn |
| Martynia louisiana Mill., orth. var. |
|
| Martynia louisianica Mill. |
|
| Martynia proboscidea Gloxin |
|
| Proboscidea jussieui auct. |
|
| Proboscidea parviflora (Woot.) Woot. & Standl. |
doubleclaw |
| Proboscidea parviflora (Woot.) Woot. & Standl. ssp. parviflora |
unicorn plant, devil's claw |
| Proboscidea parviflora (Woot.) Woot. & Standl. ssp. parviflora var. parviflora |
doubleclaw |
| Martynia parviflora Woot. |
|
| Proboscidea crassibracteata Correll |
|
| Proboscidea parviflora (Woot.) Woot. & Standl. ssp. gracillima (Hevly) Bretting |
|
| Prosartes D. Don |
|
| Prosartes trachycarpa S. Watson |
roughfruit fairybells |
| Disporum trachycarpum (S. Watson) Benth. & Hook. f. |
|
| Disporum trachycarpum (S. Watson) Benth. & Hook. f. var. subglabrum E.H. Kelso |
|
| Prosopis L. |
mesquite |
| Prosopis glandulosa Torr. |
honey mesquite |
| Prosopis glandulosa Torr. var. torreyana (L.D. Benson) M.C. Johnst. |
western honey mesquite |
| Prosopis juliflora (Sw.) DC. var. torreyana L.D. Benson |
|
| Prosopis odorata Torr. & Frém. |
|
| Prosopis pubescens Benth. |
screwbean mesquite |
| Strombocarpa odorata A. Gray |
|
| Prunella L. |
selfheal |
| Prunella vulgaris L. |
common selfheal |
| Prunella vulgaris L. ssp. lanceolata (W. Bartram) Hultén |
lance selfheal |
| Prunella vulgaris L. var. elongata Benth. |
|
| Prunella vulgaris L. var. lanceolata (W. Bartram) Fernald |
|
| Prunus L. |
plum |
| Prunus andersonii A. Gray |
desert peach |
| Prunus emarginata (Douglas ex Hook.) D. Dietr. |
bitter cherry |
| Prunus emarginata (Douglas ex Hook.) D. Dietr. var. emarginata |
bitter cherry |
| Prunus emarginata (Douglas ex Hook.) D. Dietr. var. crenulata (Greene) Kearney & Peebles |
|
| Prunus fasciculata (Torr.) A. Gray |
desert almond |
| Prunus fasciculata (Torr.) A. Gray var. fasciculata |
desert almond |
| Prunus virginiana L. |
chokecherry |
| Prunus virginiana L. var. melanocarpa (A. Nelson) Sarg. |
black chokecherry |
| Padus melanocarpa (A. Nelson) Shafer |
|
| Padus virginiana (L.) M. Roem. ssp. melanocarpa (A. Nelson) W.A. Weber |
|
| Prunus melanocarpa (A. Nelson) Rydb. |
|
| Prunus virginiana L. ssp. melanocarpa (A. Nelson) Roy L. Taylor & MacBryde |
|
| Psathyrotes A. Gray |
turtleback |
| Psathyrotes annua (Nutt.) A. Gray |
annual psathyrotes |
| Bulbostylis annua Nutt. |
|
| Psathyrotes pilifera A. Gray |
hairybeast turtleback |
| Psathyrotes ramosissima (Torr.) A. Gray |
velvet turtleback |
| Tetradymia ramosissima Torr. |
|
| ×Pseudelymus Barkworth & D.R. Dewey |
foxtail wheatgrass |
| ×Pseudelymus saxicola (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [Elymus elymoides × Pseudoroegneria spicata] |
foxtail wheatgrass |
| Agropyron saxicola (Scribn. & J.G. Sm.) Piper |
|
| ×Agrositanion saxicola (Scribn. & J.G. Sm.) Bowden |
|
| Elymus saxicola Scribn. & J.G. Sm. |
|
| Pseudocymopterus J.M. Coult. & Rose |
false springparsley |
| Pseudocymopterus montanus (A. Gray) J.M. Coult. & Rose |
alpine false springparsley |
| Cymopterus lemmonii (J.M. Coult. & Rose) Dorn |
|
| Pseudocymopterus tidestromii J.M. Coult. & Rose |
|
| Thaspium montanum A. Gray |
|
| Pseudognaphalium Kirp. |
cudweed |
| Pseudognaphalium canescens (DC.) W.A. Weber |
Wright's cudweed |
| Pseudognaphalium canescens (DC.) W.A. Weber ssp. canescens |
Wright's cudweed |
| Gnaphalium canescens DC. |
|
| Gnaphalium canescens DC. ssp. canescens |
|
| Gnaphalium wrightii A. Gray |
|
| Pseudognaphalium canescens (DC.) W.A. Weber ssp. thermale (E.E. Nelson) Kartesz |
Wright's cudweed |
| Gnaphalium canescens DC. ssp. thermale (E.E. Nelson) Stebbins & Keil |
|
| Gnaphalium microcephalum Nutt. ssp. thermale (E.E. Nelson) G.W. Douglas |
|
| Gnaphalium microcephalum Nutt. var. thermale (E.E. Nelson) Cronquist |
|
| Gnaphalium thermale E.E. Nelson |
|
| Pseudognaphalium microcephalum (Nutt.) Anderb. var. thermale (E.E. Nelson) Dorn |
|
| Pseudognaphalium luteoalbum (L.) Hilliard & B.L. Burtt |
Jersey cudweed |
| Gnaphalium luteoalbum L. |
|
| Pseudognaphalium stramineum (Kunth) Anderb. |
cottonbatting plant |
| Gnaphalium chilense Spreng. |
|
| Gnaphalium chilense Spreng. var. confertifolium Greene |
|
| Gnaphalium stramineum Kunth |
|
| Pseudoroegneria (Nevski) A. Löve |
wheatgrass |
| Pseudoroegneria spicata (Pursh) A. Löve |
bluebunch wheatgrass |
| Pseudoroegneria spicata (Pursh) A. Löve ssp. inermis (Scribn. & J.G. Sm.) A. Löve |
beardless wheatgrass |
| Agropyron inerme (Scribn. & J.G. Sm.) Rydb. |
|
| Agropyron spicatum Pursh var. inerme (Scribn. & J.G. Sm.) A. Heller |
|
| Pseudoroegneria spicata (Pursh) A. Löve ssp. spicata |
bluebunch wheatgrass |
| Agropyron spicatum Pursh |
|
| Agropyron spicatum Pursh var. pubescens Elmer |
|
| Agropyron vaseyi Scribn. & J.G. Sm. |
|
| Elymus spicatus (Pursh) Gould |
|
| Elytrigia spicata (Pursh) D.R. Dewey |
|
| Roegneria spicata (Pursh) Beetle |
|
| Pseudostellaria Pax |
pseudostellaria |
| Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartm. |
tuber starwort |
| Alsine glutinosa A. Heller |
|
| Alsine jamesiana (Torr.) A. Heller |
|
| Alsine jamesii (Torr.) Holz. |
|
| Arenaria jamesiana (Torr.) Shinners |
|
| Stellaria jamesiana Torr. |
|
| Pseudotsuga Carrière |
Douglas-fir |
| Pseudotsuga menziesii (Mirb.) Franco |
Douglas-fir |
| Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco |
Rocky Mountain Douglas-fir |
| Pseudotsuga flahaultii Flous |
|
| Pseudotsuga menziesii (Mirb.) Franco var. flahaultii (Flous) Silba |
|
| Pseudotsuga taxifolia (Lamb.) Britton var. glauca (Beissn.) Sudw. |
|
| Pseudotsuga menziesii (Mirb.) Franco var. menziesii |
Douglas-fir |
| Pseudotsuga mucronata (Raf.) Sudw. |
|
| Pseudotsuga taxifolia (Lamb.) Britton |
|
| Psilocarphus Nutt. |
woollyheads |
| Psilocarphus brevissimus Nutt. |
short woollyheads |
| Psilocarphus brevissimus Nutt. var. brevissimus |
short woollyheads |
| Psilostrophe DC. |
paperflower |
| Psilostrophe cooperi (A. Gray) Greene |
whitestem paperflower |
| Riddellia cooperi A. Gray |
|
| Psoralidium Rydb. |
scurfpea |
| Psoralidium lanceolatum (Pursh) Rydb. |
lemon scurfpea |
| Psoralea lanceolata Pursh |
|
| Psoralea lanceolata Pursh ssp. scabra (Nutt.) Piper |
|
| Psoralea lanceolata Pursh var. purshii (Vail) Piper |
|
| Psoralea lanceolata Pursh var. stenophylla (Rydb.) Toft & S.L. Welsh |
|
| Psoralea lanceolata Pursh var. stenostachys (Rydb.) S.L. Welsh |
|
| Psoralea micrantha A. Gray |
|
| Psoralea scabra Nutt. |
|
| Psoralea stenostachys Rydb. |
|
| Psoralidium lanceolatum (Pursh) Rydb. var. stenophyllum (Rydb.) S.L. Welsh |
|
| Psoralidium lanceolatum (Pursh) Rydb. var. stenostachys (Rydb.) S.L. Welsh |
|
| Psoralidium stenophyllum (Rydb.) Rydb. |
|
| Psorothamnus Rydb. |
dalea |
| Psorothamnus arborescens (Torr. ex A. Gray) Barneby |
Mojave indigobush |
| Psorothamnus arborescens (Torr. ex A. Gray) Barneby var. minutifolius (Parish) Barneby |
Johnson's indigobush |
| Dalea fremontii Torr. ex A. Gray var. minutifolia (Parish) L.D. Benson |
|
| Psorothamnus fremontii (Torr. ex A. Gray) Barneby |
Fremont's dalea |
| Psorothamnus fremontii (Torr. ex A. Gray) Barneby var. attenuatus Barneby |
Fremont's dalea |
| Psorothamnus fremontii (Torr. ex A. Gray) Barneby var. fremontii |
Fremont's dalea |
| Dalea fremontii Torr. ex A. Gray |
|
| Dalea fremontii Torr. ex A. Gray var. johnsonii (S. Watson) Munz |
|
| Psorothamnus kingii (S. Watson) Barneby |
King's dalea |
| Dalea kingii S. Watson |
|
| Psorothamnus polydenius (Torr. ex S. Watson) Rydb. |
Nevada dalea |
| Psorothamnus polydenius (Torr. ex S. Watson) Rydb. var. polydenius |
Nevada dalea |
| Dalea polydenia Torr. ex S. Watson |
|
| Dalea polydenia Torr. ex S. Watson var. subnuda S. Watson |
|
| Psorothamnus spinosus (A. Gray) Barneby |
smoketree |
| Dalea spinosa A. Gray |
|
| Pteridium Gleditsch ex Scop. |
brackenfern |
| Pteridium aquilinum (L.) Kuhn |
western brackenfern |
| Pteridium aquilinum (L.) Kuhn var. pubescens Underw. |
hairy brackenfern |
| Pteridium aquilinum (L.) Kuhn ssp. lanuginosum (Bong.) Hultén |
|
| Pteridium aquilinum (L.) Kuhn var. lanuginosum (Bong.) Fernald |
|
| Pterospora Nutt. |
pinedrops |
| Pterospora andromedea Nutt. |
woodland pinedrops |
| Pterostegia Fisch. & C.A. Mey. |
pterostegia |
| Pterostegia drymarioides Fisch. & C.A. Mey. |
woodland pterostegia |
| Pteryxia (Nutt. ex Torr. & A. Gray) Nutt. ex J.M. Coult. & Rose |
wavewing |
| Pteryxia hendersonii (J.M. Coult. & Rose) Mathias & Constance |
Henderson's wavewing |
| Aletes hendersonii (J.M. Coult. & Rose) W.A. Weber |
|
| Aletes longiloba (Rydb.) W.A. Weber |
|
| Cymopterus hendersonii (J.M. Coult. & Rose) Cronquist |
|
| Cymopterus longilobus (Rydb.) W.A. Weber |
|
| Pteryxia petraea (M.E. Jones) J.M. Coult. & Rose |
rockloving wavewing |
| Aletes petraea (M.E. Jones) W.A. Weber |
|
| Cymopterus petraeus M.E. Jones |
|
| Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. petraeus (M.E. Jones) Goodrich |
|
| Pteryxia terebinthina (Hook.) J.M. Coult. & Rose |
turpentine wavewing |
| Pteryxia terebinthina (Hook.) J.M. Coult. & Rose var. albiflora (Torr. & A. Gray) Mathias |
turpentine wavewing |
| Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. albiflorus (Torr. & A. Gray) M.E. Jones |
|
| Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. calcareus (M.E. Jones) Cronquist |
|
| Pteryxia terebinthina (Hook.) J.M. Coult. & Rose var. calcarea (M.E. Jones) Mathias |
|
| Pteryxia terebinthina (Hook.) J.M. Coult. & Rose var. californica (J.M. Coult. & Rose) Mathias |
California wavewing |
| Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. californicus (J.M. Coult. & Rose) Jeps. |
|
| Puccinellia Parl. |
alkaligrass |
| Puccinellia distans (Jacq.) Parl. |
weeping alkaligrass |
| Puccinellia distans (Jacq.) Parl. ssp. distans |
weeping alkaligrass |
| Poa distans Jacq. |
|
| Puccinellia distans (Jacq.) Parl. var. tenuis (Uechtr.) Fernald & Weath. |
|
| Puccinellia retroflexa (W. Curtis) Holmb. |
|
| Puccinellia suksdorfii H. St. John |
|
| Puccinellia fasciculata (Torr.) E.P. Bicknell |
saltmarsh alkaligrass |
| Glyceria borreri (Bab.) Bab. |
|
| Puccinellia borreri (Bab.) Hayek |
|
| Puccinellia lemmonii (Vasey) Scribn. |
Lemmon's alkaligrass |
| Puccinellia nuttalliana (Schult.) Hitchc. |
Nuttall's alkaligrass |
| Puccinellia airoides (Nutt.) S. Watson & J.M. Coult. |
|
| Puccinellia cusickii Weath. |
|
| Purshia DC. ex Poir. |
bitterbrush |
| Purshia glandulosa Curran |
desert bitterbrush |
| Purshia tridentata (Pursh) DC. var. glandulosa (Curran) M.E. Jones |
|
| Purshia stansburiana (Torr.) Henrickson |
Stansbury cliffrose |
| Cowania alba Goodding |
|
| Cowania mexicana D. Don var. stansburiana (Torr.) Jeps. |
|
| Cowania stansburiana Torr. |
|
| Purshia mexicana (D. Don) Henrickson var. stansburiana (Torr.) S.L. Welsh |
|
| Purshia tridentata (Pursh) DC. |
antelope bitterbrush |
| Purshia tridentata (Pursh) DC. var. tridentata |
|
| Pyrola L. |
wintergreen |
| Pyrola asarifolia Michx. |
liverleaf wintergreen |
| Pyrola asarifolia Michx. ssp. asarifolia |
liverleaf wintergreen |
| Pyrola asarifolia Michx. var. incarnata (DC.) Fernald |
|
| Pyrola asarifolia Michx. var. ovata Farw. |
|
| Pyrola asarifolia Michx. var. purpurea (Bunge) Fernald |
|
| Pyrola californica KrÃsa |
|
| Pyrola elata Nutt. |
|
| Pyrola rotundifolia L. ssp. asarifolia (Michx.) A. Löve & D. Löve |
|
| Pyrola uliginosa Torr. & A. Gray ex Torr. |
|
| Pyrola uliginosa Torr. & A. Gray ex Torr. var. gracilis Jennings |
|
| Pyrola chlorantha Sw. |
greenflowered wintergreen |
| Pyrola chlorantha Sw. var. convoluta (W. Bartram) Fernald |
|
| Pyrola chlorantha Sw. var. paucifolia Fernald |
|
| Pyrola chlorantha Sw. var. revoluta Jennings |
|
| Pyrola convoluta W. Bartram |
|
| Pyrola oxypetala Austin ex A. Gray |
|
| Pyrola virens Schreb. |
|
| Pyrola virens Schreb. var. convoluta (W. Bartram) Fernald |
|
| Pyrola virens Schreb. var. saximontana Fernald |
|
| Pyrola minor L. |
snowline wintergreen |
| Braxilia minor (L.) House |
|
| Erxlebenia minor (L.) Rydb. |
|
| Pyrola minor L. var. parviflora B. Boivin |
|
| Pyrola picta Sm. |
whiteveined wintergreen |
| Pyrola aphylla Sm. |
|
| Pyrola aphylla Sm. var. leptosepala Nutt. |
|
| Pyrola aphylla Sm. var. paucifolia Howell |
|
| Pyrola blanda Andres |
|
| Pyrola conardiana Andres |
|
| Pyrola dentata Sm. |
|
| Pyrola dentata Sm. var. apophylla Copeland |
|
| Pyrola dentata Sm. var. integra A. Gray |
|
| Pyrola pallida Greene |
|
| Pyrola paradoxa Andres |
|
| Pyrola picta Sm. ssp. dentata (Sm.) Piper |
|
| Pyrola picta Sm. ssp. integra (A. Gray) Piper |
|
| Pyrola picta Sm. ssp. pallida (Greene) Andres |
|
| Pyrola picta Sm. var. dentata (Sm.) Dorn |
|
| Pyrola septentrionalis Andres |
|
| Pyrola sparsifolia Suksd. |
|
| Pyrrocoma Hook. |
goldenweed |
| Pyrrocoma apargioides (A. Gray) Greene |
alpineflames |
| Haplopappus apargioides A. Gray |
|
| Pyrrocoma carthamoides Hook. |
largeflower goldenweed |
| Pyrrocoma carthamoides Hook. var. cusickii (A. Gray) Kartesz & Gandhi |
largeflower goldenweed |
| Haplopappus carthamoides (Hook.) A. Gray ssp. cusickii (A. Gray) H.M. Hall |
|
| Haplopappus carthamoides (Hook.) A. Gray var. cusickii A. Gray |
|
| Pyrrocoma hirta (A. Gray) Greene |
tacky goldenweed |
| Pyrrocoma hirta (A. Gray) Greene var. hirta |
tacky goldenweed |
| Haplopappus hirtus A. Gray |
|
| Haplopappus hirtus A. Gray ssp. typicus H.M. Hall |
|
| Pyrrocoma hirta (A. Gray) Greene var. lanulosa (Greene) Mayes ex G. Brown & Keil |
tacky goldenweed |
| Haplopappus hirtus A. Gray ssp. lanulosus (Greene) H.M. Hall |
|
| Haplopappus hirtus A. Gray var. lanulosus (Greene) M. Peck |
|
| Pyrrocoma lanulosa Greene |
|
| Pyrrocoma lanceolata (Hook.) Greene |
lanceleaf goldenweed |
| Pyrrocoma lanceolata (Hook.) Greene var. lanceolata |
lanceleaf goldenweed |
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray ssp. solidagineus (Greene) H.M. Hall |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray ssp. tenuicaulis (D.C. Eaton) H.M. Hall |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray ssp. vaseyi (Parry ex D.C. Eaton) H.M. Hall |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray var. sublanatus Cody |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray var. tenuicaulis (D.C. Eaton) A. Gray |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray var. typicus (H.M. Hall) Cronquist |
|
| Haplopappus lanceolatus (Hook.) Torr. & A. Gray var. vaseyi Parry ex D.C. Eaton |
|
| Pyrrocoma lanceolata (Hook.) Greene var. subviscosa (Greene) Mayes ex G. Brown & Keil |
lanceleaf goldenweed |
| Haplopappus subviscosus (Greene) S.F. Blake |
|
| Pyrrocoma subviscosa Greene |
|
| Pyrrocoma racemosa (Nutt.) Torr. & A. Gray |
clustered goldenweed |
| Pyrrocoma racemosa (Nutt.) Torr. & A. Gray var. paniculata (Nutt.) Kartesz & Gandhi |
clustered goldenweed |
| Haplopappus paniculatus (Nutt.) A. Gray var. virgatus A. Gray |
|
| Haplopappus racemosus (Nutt.) Torr. ssp. brachycephalus (A. Nelson) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. ssp. duriuscula (Greene) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. ssp. glomeratus (Nutt.) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. ssp. halophilus (Greene) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. ssp. prionophyllus (Greene) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. var. glomerellus (Nutt.) A. Gray |
|
| Haplopappus racemosus (Nutt.) Torr. var. paniculatus (Nutt.) Cronquist |
|
| Haplopappus racemosus (Nutt.) Torr. var. prionophyllus (Greene) S.L. Welsh |
|
| Pyrrocoma racemosa (Nutt.) Torr. & A. Gray var. sessiliflora (Greene) Mayes ex G. Brown & Keil |
clustered goldenweed |
| Haplopappus racemosus (Nutt.) Torr. ssp. sessiliflorus (Greene) H.M. Hall |
|
| Haplopappus racemosus (Nutt.) Torr. var. sessiliflorus (Greene) S.L. Welsh |
|
| Pyrrocoma sessiliflora Greene |
|
| Pyrrocoma uniflora (Hook.) Greene |
plantain goldenweed |
| Pyrrocoma uniflora (Hook.) Greene var. uniflora |
plantain goldenweed |
| Haplopappus contractus H.M. Hall |
|
| Haplopappus uniflorus (Hook.) Torr. & A. Gray |
|
| Haplopappus uniflorus (Hook.) Torr. & A. Gray ssp. howellii (A. Gray) H.M. Hall |
|
| Haplopappus uniflorus (Hook.) Torr. & A. Gray ssp. typicus H.M. Hall |
|
| Haplopappus uniflorus (Hook.) Torr. & A. Gray var. howellii (A. Gray) M. Peck |
|
| Pyrrocoma howellii (A. Gray) Greene |
|
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