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Plant List
Indexed Alphabetically by Common Name
P-Q
For a list of plants indexed by Scientific Name, click here
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| National Common Name | Scientific Name with Author | Symbol | Family | |
| pacaya | Chamaedorea costaricana Oerst. | CHCO27 | Arecaceae | |
| Pacific alpine wormwood | Artemisia glomerata Ledeb. | ARGL9 | Asteraceae | |
| Pacific alpine wormwood | Artemisia glomerata Ledeb. var. glomerata | ARGLG | Asteraceae | |
| Pacific alpine wormwood | Artemisia glomerata Ledeb. var. subglabrata Hultén | ARGLS | Asteraceae | |
| Pacific anemone | Anemone multifida Poir. | ANMU | Ranunculaceae | |
| Pacific anemone | Anemone multifida Poir. var. ?hirsuta C.L. Hitchc. | ANMUH | Ranunculaceae | |
| Pacific anemone | Anemone multifida Poir. var. multifida Poir. [excluded] | ANMUM3 | Ranunculaceae | |
| Pacific anemone | Anemone multifida Poir. var. stylosa (A. Nels.) Dutton & Keener | ANMUS5 | Ranunculaceae | |
| Pacific bentgrass | Agrostis avenacea J.F. Gmel. | AGAV | Poaceae | |
| Pacific brachythecium moss | Brachythecium reflexum (Starke in Web. & Mohr) Schimp. in B.S.G. var. pacificum Ren. & Card. in Röll | BRREP | Brachytheciaceae | |
| Pacific bristlystalked sedge | Carex leptalea Wahlenb. ssp. pacifica Calder & Taylor | CALEP2 | Cyperaceae | |
| Pacific brome | Bromus pacificus Shear | BRPA3 | Poaceae | |
| Pacific brownish sedge | Carex brunnescens (Pers.) Poir. ssp. pacifica Kalela | CABRP2 | Cyperaceae | |
| Pacific coralroot | Corallorhiza mertensiana Bong. | COME17 | Orchidaceae | |
| Pacific cyrtandra | Cyrtandra grayana Hbd. | CYGR6 | Gesneriaceae | |
| Pacific dogwood | Cornus nuttallii Audubon ex Torr. & Gray | CONU4 | Cornaceae | |
| Pacific false bindweed | Calystegia purpurata (Greene) Brummitt | CAPU18 | Convolvulaceae | |
| Pacific false bindweed | Calystegia purpurata (Greene) Brummitt ssp. purpurata | CAPUP2 | Convolvulaceae | |
| Pacific false bindweed | Calystegia purpurata (Greene) Brummitt ssp. saxicola (Eastw.) Brummitt | CAPUS | Convolvulaceae | |
| Pacific foxtail | Alopecurus saccatus Vasey | ALSA3 | Poaceae | |
| Pacific golden saxifrage | Chrysosplenium glechomifolium Nutt. | CHGL5 | Saxifragaceae | |
| Pacific hemlockparsley | Conioselinum gmelinii (Cham. & Schlecht.) Steud. | COGM | Apiaceae | |
| Pacific hound's tongue | Cynoglossum grande Dougl. ex Lehm. | CYGR | Boraginaceae | |
| Pacific island flatsedge | Cyperus cyperoides (L.) Kuntze | CYCY2 | Cyperaceae | |
| Pacific lacefern | Ctenitis squamigera (Hook. & Arn.) Copeland | CTSQ | Dryopteridaceae | |
| Pacific madrone | Arbutus menziesii Pursh | ARME | Ericaceae | |
| Pacific manzanita | Arctostaphylos pacifica J.B. Roof | ARPA19 | Ericaceae | |
| Pacific mosquitofern | Azolla filiculoides Lam. | AZFI | Azollaceae | |
| Pacific onion | Allium validum S. Wats. | ALVA | Liliaceae | |
| Pacific reedgrass | Calamagrostis nutkaensis (J. Presl) J. Presl ex Steud. | CANU | Poaceae | |
| Pacific reindeer lichen | Cladina portentosa (Dufour) Follmann ssp. pacifica (Ahti) Ahti | CLPOP | Cladoniaceae | |
| Pacific serviceberry | Amelanchier interior Nielsen | AMIN2 | Rosaceae | |
| Pacific silver fir | Abies amabilis (Dougl. ex Loud.) Dougl. ex Forbes | ABAM | Pinaceae | |
| Pacific silverweed | Argentina egedii (Wormsk.) Rydb. | AREG | Rosaceae | |
| Pacific silverweed | Argentina egedii (Wormsk.) Rydb. ssp. egedii | AREGE | Rosaceae | |
| Pacific silverweed | Argentina egedii (Wormsk.) Rydb. ssp. groenlandica (Tratt.) A. Löve | AREGG | Rosaceae | |
| Pacific springbeauty | Claytonia lanceolata Pall. ex Pursh var. pacifica McNeill | CLLAP | Portulacaceae | |
| Pacific yarrow | Achillea millefolium L. var. pacifica (Rydb.) G.N. Jones | ACMIP | Asteraceae | |
| Packard's milkvetch | Astragalus cusickii Gray var. packardiae Barneby | ASCUP | Fabaceae | |
| Packard's wormwood | Artemisia packardiae J. Grimes & Ertter | ARPA20 | Asteraceae | |
| Padang cassia | Cinnamomum burmannii (Nees & Th. Nees) Nees ex Blume | CIBU2 | Lauraceae | |
| Paddo rockcress | Arabis lemmonii S. Wats. var. paddoensis Rollins | ARLEP | Brassicaceae | |
| pagoda-plant | Blephilia Raf. | BLEPH5 | Lamiaceae | |
| pagumpa milkvetch | Astragalus ensiformis M.E. Jones | ASEN4 | Fabaceae | |
| pagumpa milkvetch | Astragalus ensiformis M.E. Jones var. ensiformis | ASENE | Fabaceae | |
| pagumpa milkvetch | Astragalus ensiformis M.E. Jones var. gracilior Barneby | ASENG | Fabaceae | |
| pahuen | Adesmia microphylla Hook. & Arn. | ADMI2 | Fabaceae | |
| painted buckeye | Aesculus sylvatica Bartr. | AESY | Hippocastanaceae | |
| painted desert milkvetch | Astragalus sophoroides M.E. Jones | ASSO4 | Fabaceae | |
| painted milkvetch | Astragalus ceramicus Sheldon | ASCE | Fabaceae | |
| painted milkvetch | Astragalus ceramicus Sheldon var. apus Barneby | ASCEA | Fabaceae | |
| painted milkvetch | Astragalus ceramicus Sheldon var. ceramicus | ASCEC | Fabaceae | |
| painted milkvetch | Astragalus ceramicus Sheldon var. filifolius (Gray) F.J. Herm. | ASCEF | Fabaceae | |
| paintedtongue | Bouchetia erecta DC. | BOER3 | Solanaceae | |
| Paiute cypress | Cupressus arizonica Greene ssp. nevadensis (Abrams) E. Murray | CUARN2 | Cupressaceae | |
| Paiute false bindweed | Calystegia longipes (S. Wats.) Brummitt | CALO12 | Convolvulaceae | |
| Paiute suncup | Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven | CASC18 | Onagraceae | |
| Paiute suncup | Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven ssp. brachycarpa (Raven) Raven | CASCB2 | Onagraceae | |
| Paiute suncup | Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven ssp. macrocarpa (Raven) Raven | CASCM | Onagraceae | |
| Paiute suncup | Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven ssp. scapoidea | CASCS3 | Onagraceae | |
| Pajaro manzanita | Arctostaphylos pajaroensis (J.E. Adams ex McMinn) J.E. Adams | ARPA3 | Ericaceae | |
| pak choi | Brassica chinensis L. | BRCH4 | Brassicaceae | |
| Palay rubbervine | Cryptostegia grandiflora (Roxb. ex R. Br.) R. Br. | CRGR6 | Asclepiadaceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. | AGGL | Asteraceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. var. agrestis (Osterhout) Q. Jones ex Cronq. | AGGLA | Asteraceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. var. cronquistii Welsh | AGGLC | Asteraceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & Gray) Jepson | AGGLD | Asteraceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. var. glauca | AGGLG | Asteraceae | |
| pale agoseris | Agoseris glauca (Pursh) Raf. var. monticola (Greene) Q. Jones ex Cronq. | AGGLM | Asteraceae | |
| pale bastard toadflax | Comandra umbellata (L.) Nutt. ssp. pallida (A. DC.) Piehl | COUMP | Santalaceae | |
| pale bellflower | Campanula scouleri Hook. ex A. DC. | CASC7 | Campanulaceae | |
| pale biddy-biddy | Acaena pallida (Kirk) Allen | ACPA14 | Rosaceae | |
| pale botrychium | Botrychium pallidum W.H. Wagner | BOPA12 | Ophioglossaceae | |
| pale bugseed | Corispermum pallidum Mosyakin | COPA39 | Chenopodiaceae | |
| pale callicostella moss | Callicostella pallida (Hornsch.) Ĺngstr. | CAPA67 |