| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CAPA20 | Carex paucicostata Mackenzie | Carex lenticularis var. impressa | Cyperaceae
|
| CAPA19 | Carex pauciflora Lightf. | fewflower sedge | Cyperaceae
|
| CAPA21 | Carex paucifructus Mackenzie | Carex mariposana | Cyperaceae
|
| CAPAB3 | Carex paupercula Michx. var. brevisquama Fern. | Carex magellanica ssp. irrigua | Cyperaceae
|
| CAPAI4 | Carex paupercula Michx. var. irrigua (Wahlenb.) Fern. | Carex magellanica ssp. irrigua | Cyperaceae
|
| CAPAP9 | Carex paupercula Michx. var. pallens Fern. | Carex magellanica ssp. irrigua | Cyperaceae
|
| CAPA22 | Carex paupercula Michx. | Carex magellanica ssp. irrigua | Cyperaceae
|
| CAPA31 | Carex paysonis Clokey | Payson's sedge | Cyperaceae
|
| CAPE11 | Carex peckii Howe | Peck's sedge | Cyperaceae
|
| CAPE4 | Carex pedunculata Muhl. ex Willd. | longstalk sedge | Cyperaceae
|
| CAPE42 | Carex pellita Muhl ex Willd. | woolly sedge | Cyperaceae
|
| CAPE5 | Carex pelocarpa F.J. Herm. | duskyseed sedge | Cyperaceae
|
| CAPE45 | Carex pendula Huds. | hanging sedge | Cyperaceae
|
| CAPEH | Carex pensylvanica Lam. ssp. heliophila (Mackenzie) W.A. Weber | Carex inops ssp. heliophila | Cyperaceae
|
| CAPED | Carex pensylvanica Lam. var. digyna Boeckl. | Carex inops ssp. heliophila | Cyperaceae
|
| CAPED2 | Carex pensylvanica Lam. var. distans Peck | Carex lucorum var. lucorum | Cyperaceae
|
| CAPEG | Carex pensylvanica Lam. var. glumabunda Peck | Carex pensylvanica | Cyperaceae
|
| CAPEL | Carex pensylvanica Lam. var. lucorum (Willd. ex Link) Fern. | Carex lucorum var. lucorum | Cyperaceae
|
| CAPEM2 | Carex pensylvanica Lam. var. marginata (Willd.) Dewey | Carex pensylvanica | Cyperaceae
|
| CAPES2 | Carex pensylvanica Lam. var. separans Peck | Carex lucorum var. lucorum | Cyperaceae
|
| CAPEV | Carex pensylvanica Lam. var. vespertina Bailey | Carex pensylvanica | Cyperaceae
|
| CAPE6 | Carex pensylvanica Lam. | Pennsylvania sedge | Cyperaceae
|
| CAPE40 | Carex perdentata S.D. Jones | sand sedge | Cyperaceae
|
| CAPE12 | Carex perglobosa Mackenzie | globe sedge | Cyperaceae
|
| CAPE7 | Carex petasata Dewey | Liddon sedge | Cyperaceae
|
| CAPED3 | Carex petricosa Dewey var. distichiflora (Boivin) Boivin | Carex petricosa | Cyperaceae
|
| CAPEF | Carex petricosa Dewey var. franklinii (Boott) Boivin | Carex petricosa | Cyperaceae
|
| CAPE8 | Carex petricosa Dewey | rockdwelling sedge | Cyperaceae
|
| CAPH2 | Carex phaeocephala Piper | dunhead sedge | Cyperaceae
|
| CAPHA | Carex phyllomanica W. Boott var. angustata (Carey) Boivin | Carex echinata ssp. echinata | Cyperaceae
|
| CAPHO | Carex phyllomanica W. Boott var. ormantha (Fern.) Boivin | Carex echinata ssp. echinata | Cyperaceae
|
| CAPH6 | Carex phyllomanica W. Boott | Carex echinata ssp. phyllomanica | Cyperaceae
|
| CAPH7 | Carex physocarpa J.& K. Presl | Carex saxatilis | Cyperaceae
|
| CAPH8 | Carex �physocarpioides Lepage | russet sedge | Cyperaceae
|
| CAPH4 | Carex physorhyncha Liebm. ex Steud. | Carex albicans var. australis | Cyperaceae
|
| CAPI5 | Carex picta Steud. | Boott's sedge | Cyperaceae
|
| CAPI21 | Carex pigra Naczi | | Cyperaceae
|
| CAPI6 | Carex piperi Mackenzie | Piper's sedge | Cyperaceae
|
| CAPI7 | Carex pityophila Mackenzie | loving sedge | Cyperaceae
|
| CAPL12 | Carex plana Mackenzie | Carex muehlenbergii var. enervis | Cyperaceae
|
| CAPL3 | Carex planostachys Kunze | cedar sedge | Cyperaceae
|
| CAPL4 | Carex plantaginea Lam. | plantainleaf sedge | Cyperaceae
|
| CAPL8 | Carex platylepis Mackenzie | broadscale sedge | Cyperaceae
|
| CAPL5 | Carex platyphylla Carey | broadleaf sedge | Cyperaceae
|
| CAPL9 | Carex plectocarpa F.J. Herm. | Carex lenticularis var. dolia | Cyperaceae
|
| CAPL6 | Carex pluriflora Hult�n | manyflower sedge | Cyperaceae
|
| CAPLK | Carex pluvia R.W. Krauss var. koolauensis R.W. Krauss | Carex alligata | Cyperaceae
|
| CAPL10 | Carex pluvia R.W. Krauss | Carex alligata | Cyperaceae
|
| CAPOP3 | Carex podocarpa R. Br. var. paysonis (Clokey) Boivin | Carex paysonis | Cyperaceae
|
| CAPO | Carex podocarpa R. Br. | shortstalk sedge | Cyperaceae
|
| CAPO4 | Carex polymorpha Muhl. | variable sedge | Cyperaceae
|
| CAPO5 | Carex polystachya Sw. ex Wahlenb. | Caribbean sedge | Cyperaceae
|
| CAPR4 | Carex praeceptorium Mackenzie | early sedge | Cyperaceae
|
| CAPR5 | Carex praegracilis W. Boott | clustered field sedge | Cyperaceae
|
| CAPR6 | Carex prairea Dewey ex Wood | prairie sedge | Cyperaceae
|
| CAPR12 | Carex prasina Wahlenb. | drooping sedge | Cyperaceae
|
| CAPRS | Carex praticola Rydb. var. subcoriacea F.J. Herm. | Carex praticola | Cyperaceae
|
| CAPR7 | Carex praticola Rydb. | meadow sedge | Cyperaceae
|
| CAPR8 | Carex preslii Steud. | Presl's sedge | Cyperaceae
|
| CAPR16 | Carex pribylovensis Macoun | Carex glareosa ssp. pribylovensis | Cyperaceae
|
| CAPR13 | Carex prionophylla Holm | Carex scopulorum var. prionophylla | Cyperaceae
|
| CAPR9 | Carex projecta Mackenzie | necklace sedge | Cyperaceae
|
| CAPR10 | Carex proposita Mackenzie | Great Smoky Mountain sedge | Cyperaceae
|
| CAPS | Carex pseudocyperus L. | cypresslike sedge | Cyperaceae
|
| CAPS4 | Carex �pseudohelvola Kihlm. (pro sp.) | | Cyperaceae
|
| CAPS2 | Carex pseudoscirpoidea Rydb. | western singlespike sedge | Cyperaceae
|
| CAPU32 | Carex pumila Thunb. | dwarf sedge | Cyperaceae
|
| CAPU12 | Carex purpurifera Mackenzie | purple sedge | Cyperaceae
|
| CAPYM | Carex pyrenaica Wahlenb. ssp. micropoda (C.A. Mey.) Hult�n | Pyrenean sedge | Cyperaceae
|
| CAPYP | Carex pyrenaica Wahlenb. ssp. pyrenaica | Pyrenean sedge | Cyperaceae
|
| CAPY3 | Carex pyrenaica Wahlenb. | Pyrenean sedge | Cyperaceae
|
| CAPY6 | Carex pyrophila Gandog. | Carex pachystachya | Cyperaceae
|
| CARA13 | Carex rachillis Maguire | Carex subnigricans | Cyperaceae
|
| CARA20 | Carex radfordii Gaddy | Radford's sedge | Cyperaceae
|
| CARAS | Carex radiata (Wahlenb.) Small var. staminata Peck ex Howe | Carex radiata | Cyperaceae
|
| CARA8 | Carex radiata (Wahlenb.) Small | eastern star sedge | Cyperaceae
|
| CARA14 | Carex raeana Boott | Carex vesicaria var. raeana | Cyperaceae
|
| CARAC | Carex ramenskii Komarov var. caudata Hult�n | Carex ramenskii | Cyperaceae
|
| CARA4 | Carex ramenskii Komarov | Ramensk's sedge | Cyperaceae
|
| CARAP | Carex rariflora (Wahlenb.) Sm. var. pluriflora (Hult�n) Boivin | Carex pluriflora | Cyperaceae
|
| CARA5 | Carex rariflora (Wahlenb.) Sm. | looseflower alpine sedge | Cyperaceae
|
| CARA9 | Carex raymondii Calder | Raymond's sedge | Cyperaceae
|
| CARA6 | Carex raynoldsii Dewey | Raynolds' sedge | Cyperaceae
|
| CARE14 | Carex recta Boott | estuary sedge | Cyperaceae
|
| CARE11 | Carex rectior Mackenzie | Carex granularis var. granularis | Cyperaceae
|
| CARE17 | Carex reniformis (Bailey) Small | kidneyshape sedge | Cyperaceae
|
| CARET | Carex retroflexa Muhl. ex Willd. var. texensis (Torr.) Fern. | Carex texensis | Cyperaceae
|
| CARE9 | Carex retroflexa Muhl. ex Willd. | reflexed sedge | Cyperaceae
|
| CARE4 | Carex retrorsa Schwein. | knotsheath sedge | Cyperaceae
|
| CARH5 | Carex rhomalea (Fern.) Mackenzie | Carex saxatilis | Cyperaceae
|
| CARH9 | Carex rhynchophysa Fisch., C.A. Mey. & Av�-Lall. | Carex utriculata | Cyperaceae
|
| CARI | Carex richardsonii R. Br. | Richardson's sedge | Cyperaceae
|
| CARI6 | Carex richii (Fern.) Mackenzie | Carex straminea | Cyperaceae
|
| CARII | Carex riparia M.A. Curtis var. impressa S.H. Wright | Carex hyalinolepis | Cyperaceae
|
| CARIL | Carex riparia M.A. Curtis var. lacustris (Willd.) K�kenth. | Carex lacustris | Cyperaceae
|
| CARI7 | Carex riparia auct. non M.A. Curtis | Carex hyalinolepis | Cyperaceae
|
| CARO10 | Carex roanensis F.J. Herm. | Roan Mountain sedge | Cyperaceae
|
| CAROM | Carex rosea Schkuhr ex Willd. var. minor Boott | Carex radiata | Cyperaceae
|
| CAROP2 | Carex rosea Schkuhr ex Willd. var. pusilla Peck & Howe | Carex rosea | Cyperaceae
|
| CAROR2 | Carex rosea Schkuhr ex Willd. var. radiata (Wahlenb.) Dewey | Carex radiata | Cyperaceae
|
| CARO22 | Carex rosea Schkuhr ex Willd. | rosy sedge | Cyperaceae
|