| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Superorder | Lilianae |
| Order | Poales |
| Family | Cyperaceae |
| Subfamily | Cyperoideae |
| Tribe | Cariceae |
| Genus | Carex |
| Species | Carex borealipolaris |
| Species | Carex myosuroides |
| Species | Carex simpliciuscula |
| Species | Carex testacea |
| Section | Carex sect. Acrocystis |
| Species | Carex albicans |
| Species | Carex communis |
| Species | Carex deflexa |
| Species | Carex inops |
| Species | Carex lucorum |
| Species | Carex nigromarginata |
| Species | Carex novae-angliae |
| Species | Carex peckii |
| Species | Carex pensylvanica |
| Species | Carex rossii |
| Species | Carex tonsa |
| Species | Carex umbellata |
| Species | Carex zikae |
| Section | Carex sect. Albae |
| Species | Carex eburnea |
| Section | Carex sect. Ammoglochin |
| Species | Carex siccata |
| Section | Carex sect. Anomalae |
| Species | Carex amplifolia |
| Species | Carex scabrata |
| Section | Carex sect. Aulocystis |
| Species | Carex atrofusca |
| Species | Carex fuliginosa |
| Species | Carex luzulina |
| Species | Carex petricosa |
| Section | Carex sect. Bicolores |
| Species | Carex aurea |
| Species | Carex bicolor |
| Species | Carex garberi |
| Species | Carex hassei |
| Section | Carex sect. Capituligerae |
| Species | Carex arctogena |
| Species | Carex capitata |
| Section | Carex sect. Carex |
| Species | Carex atherodes |
| Species | Carex hirta |
| Species | Carex laeviconica |
| Species | Carex trichocarpa |
| Section | Carex sect. Careyanae |
| Species | Carex careyana |
| Species | Carex digitalis |
| Species | Carex laxiculmis |
| Species | Carex plantaginea |
| Species | Carex platyphylla |
| Section | Carex sect. Ceratocystis |
| Species | Carex cryptolepis |
| Species | Carex flava |
| Species | Carex hostiana |
| Species | Carex viridula |
| Species | Carex ×fulva |
| Species | Carex ×pieperiana |
| Species | Carex ×schatzii |
| Species | Carex ×subviridula |
| Species | Carex ×xanthocarpa |
| Section | Carex sect. Chlorostachyae |
| Species | Carex capillaris |
| Species | Carex krausei |
| Species | Carex williamsii |
| Section | Carex sect. Chordorrhizae |
| Species | Carex chordorrhiza |
| Section | Carex sect. Circinatae |
| Species | Carex anthoxanthea |
| Species | Carex circinata |
| Section | Carex sect. Clandestinae |
| Species | Carex concinna |
| Species | Carex concinnoides |
| Species | Carex pedunculata |
| Species | Carex richardsonii |
| Section | Carex sect. Cyperoideae |
| Species | Carex sychnocephala |
| Section | Carex sect. Deweyanae |
| Species | Carex bolanderi |
| Species | Carex bromoides |
| Species | Carex deweyana |
| Species | Carex infirminervia |
| Species | Carex laeviculmis |
| Species | Carex leptopoda |
| Section | Carex sect. Dispermae |
| Species | Carex disperma |
| Section | Carex sect. Divisae |
| Species | Carex douglasii |
| Species | Carex duriuscula |
| Species | Carex pansa |
| Species | Carex praegracilis |
| Species | Carex simulata |
| Section | Carex sect. Dornera |
| Species | Carex micropoda |
| Species | Carex nigricans |
| Section | Carex sect. Filifoliae |
| Species | Carex filifolia |
| Section | Carex sect. Firmiculmes |
| Species | Carex geyeri |
| Section | Carex sect. Foetidae |
| Species | Carex incurviformis |
| Species | Carex maritima |
| Section | Carex sect. Glareosae |
| Species | Carex arcta |
| Species | Carex arctiformis |
| Species | Carex billingsii |
| Species | Carex bonanzensis |
| Species | Carex brunnescens |
| Species | Carex brunnescens subsp. brunnescens × Carex canescens subsp. canescens |
| Species | Carex canescens |
| Species | Carex canescens subsp. canescens × Carex praeceptorum |
| Species | Carex canescens subsp. canescens × Carex trisperma |
| Species | Carex glareosa |
| Species | Carex glareosa subsp. glareosa × Carex lachenalii |
| Species | Carex heleonastes |
| Species | Carex illota |
| Species | Carex lachenalii |
| Species | Carex lapponica |
| Species | Carex loliacea |
| Species | Carex mackenziei |
| Species | Carex marina |
| Species | Carex praeceptorum |
| Species | Carex tenuiflora |
| Species | Carex trisperma |
| Species | Carex ursina |
| Species | Carex ×clausa |
| Species | Carex ×helvola |
| Species | Carex ×kyyhkynenii |
| Species | Carex ×pseudohelvola |
| Species | Carex ×trichina |
| Species | Carex ×zahnii |
| Section | Carex sect. Granulares |
| Species | Carex crawei |
| Species | Carex granularis |
| Section | Carex sect. Griseae |
| Species | Carex amphibola |
| Species | Carex conoidea |
| Species | Carex glaucodea |
| Species | Carex grisea |
| Species | Carex hitchcockiana |
| Species | Carex oligocarpa |
| Section | Carex sect. Heleoglochin |
| Species | Carex cusickii |
| Species | Carex diandra |
| Species | Carex prairea |
| Section | Carex sect. Hirtifoliae |
| Species | Carex hirtifolia |
| Section | Carex sect. Holarrhenae |
| Species | Carex disticha |
| Species | Carex sartwellii |
| Section | Carex sect. Hymenochlaenae |
| Species | Carex arctata |
| Species | Carex assiniboinensis |
| Species | Carex castanea |
| Species | Carex castanea × Carex debilis |
| Species | Carex davisii |
| Species | Carex debilis |
| Species | Carex formosa |
| Species | Carex gracillima |
| Species | Carex prasina |
| Species | Carex sprengelii |
| Species | Carex sylvatica |
| Species | Carex ×knieskernii |
| Section | Carex sect. Inflatae |
| Species | Carex engelmannii |
| Section | Carex sect. Intersectional |
| Species | Carex bigelowii subsp. bigelowii × Carex rariflora |
| Species | Carex bigelowii subsp. bigelowii × Carex stylosa |
| Species | Carex buxbaumii × Carex stricta |
| Species | Carex folliculata × Carex lurida |
| Species | Carex lachenalii × Carex parallela |
| Species | Carex lacustris × Carex trichocarpa |
| Species | Carex lenticularis × Carex saxatilis |
| Species | Carex lupulina × Carex lurida |
| Species | Carex macrochaeta × Carex spectabilis |
| Species | Carex maritima × Carex parallela |
| Species | Carex nigra × Carex stylosa |
| Species | Carex rostrata × Carex saxatilis |
| Species | Carex saxatilis × Carex stylosa |
| Species | Carex ×cayouettei |
| Species | Carex ×langeana |
| Species | Carex ×mirata |
| Species | Carex ×neomiliaris |
| Species | Carex ×notholimosioides |
| Species | Carex ×patuensis |
| Species | Carex ×quebecensis |
| Species | Carex ×soerensenii |
| Species | Carex ×sullivantii |
| Section | Carex sect. Lamprochlaenae |
| Species | Carex glacialis |
| Species | Carex supina |
| Section | Carex sect. Laxiflorae |
| Species | Carex albursina |
| Species | Carex blanda |
| Species | Carex gracilescens |
| Species | Carex hendersonii |
| Species | Carex laxiflora |
| Species | Carex leptonervia |
| Species | Carex ormostachya |
| Species | Carex striatula |
| Section | Carex sect. Leptocephalae |
| Species | Carex leptalea |
| Section | Carex sect. Leucoglochin |
| Species | Carex microglochin |
| Species | Carex pauciflora |
| Section | Carex sect. Limosae |
| Species | Carex limosa |
| Species | Carex macrochaeta |
| Species | Carex magellanica |
| Species | Carex pluriflora |
| Species | Carex rariflora |
| Species | Carex ×connectens |
| Species | Carex ×firmior |
| Section | Carex sect. Lupulinae |
| Species | Carex grayi |
| Species | Carex intumescens |
| Species | Carex lupuliformis |
| Species | Carex lupulina |
| Section | Carex sect. Macrocephalae |
| Species | Carex macrocephala |
| Section | Carex sect. Mitratae |
| Species | Carex caryophyllea |
| Section | Carex sect. Multiflorae |
| Species | Carex alma |
| Species | Carex annectens |
| Species | Carex vulpinoidea |
| Section | Carex sect. Nardinae |
| Species | Carex nardina |
| Section | Carex sect. Obtusatae |
| Species | Carex obtusata |
| Section | Carex sect. Ovales |
| Species | Carex adusta |
| Species | Carex adusta × Carex foenea |
| Species | Carex alata |
| Species | Carex argyrantha |
| Species | Carex athrostachya |
| Species | Carex bebbii |
| Species | Carex bebbii × Carex cristatella |
| Species | Carex bicknellii |
| Species | Carex brevior |
| Species | Carex brevior × Carex foenea |
| Species | Carex crawfordii |
| Species | Carex cristatella |
| Species | Carex cumulata |
| Species | Carex cumulata × Carex foenea |
| Species | Carex cumulata × Carex scoparia |
| Species | Carex ebenea |
| Species | Carex echinodes |
| Species | Carex festucacea |
| Species | Carex feta |
| Species | Carex foenea |
| Species | Carex foenea × Carex praticola |
| Species | Carex foenea × Carex tenera var. tenera |
| Species | Carex foenea × Carex xerantica |
| Species | Carex haydeniana |
| Species | Carex hormathodes |
| Species | Carex leporina |
| Species | Carex longii |
| Species | Carex macloviana |
| Species | Carex merritt-fernaldii |
| Species | Carex microptera |
| Species | Carex molesta |
| Species | Carex muskingumensis |
| Species | Carex normalis |
| Species | Carex pachystachya |
| Species | Carex petasata |
| Species | Carex phaeocephala |
| Species | Carex praticola |
| Species | Carex preslii |
| Species | Carex projecta |
| Species | Carex proposita |
| Species | Carex scoparia |
| Species | Carex scoparia × Carex silicea |
| Species | Carex silicea |
| Species | Carex straminea |
| Species | Carex suberecta |
| Species | Carex subfusca |
| Species | Carex tahoensis |
| Species | Carex tenera |
| Species | Carex tincta |
| Species | Carex tribuloides |
| Species | Carex unilateralis |
| Species | Carex waponahkikensis |
| Species | Carex xerantica |
| Section | Carex sect. Paludosae |
| Species | Carex acutiformis |
| Species | Carex houghtoniana |
| Species | Carex hyalinolepis |
| Species | Carex lacustris |
| Species | Carex lasiocarpa |
| Species | Carex melanostachya |
| Species | Carex pellita |
| Species | Carex ×subimpressa |
| Section | Carex sect. Paniceae |
| Species | Carex laxa |
| Species | Carex livida |
| Species | Carex meadii |
| Species | Carex panicea |
| Species | Carex tetanica |
| Species | Carex vaginata |
| Species | Carex woodii |
| Section | Carex sect. Phacocystis |
| Species | Carex aperta |
| Species | Carex aquatilis |
| Species | Carex aquatilis var. aquatilis × Carex stricta |
| Species | Carex aquatilis var. dives × Carex kelloggii var. kelloggii |
| Species | Carex aquatilis var. dives × Carex lyngbyei |
| Species | Carex barbarae |
| Species | Carex bigelowii |
| Species | Carex bigelowii subsp. bigelowii × Carex rufina |
| Species | Carex bigelowii subsp. bigelowii × Carex ×subsalina |
| Species | Carex bigelowii subsp. lugens × Carex scopulorum |
| Species | Carex crinita |
| Species | Carex crinita var. crinita × Carex lenticularis |
| Species | Carex eleusinoides |
| Species | Carex emoryi |
| Species | Carex enanderi |
| Species | Carex gynandra |
| Species | Carex haydenii |
| Species | Carex interrupta |
| Species | Carex kelloggii |
| Species | Carex kelloggii var. kelloggii × Carex spectabilis |
| Species | Carex lenticularis |
| Species | Carex lyngbyei |
| Species | Carex lyngbyei × Carex nigra |
| Species | Carex microchaeta |
| Species | Carex microchaeta × Carex podocarpa |
| Species | Carex nebrascensis |
| Species | Carex nigra |
| Species | Carex obnupta |
| Species | Carex paleacea |
| Species | Carex paleacea × Carex stricta |
| Species | Carex paleacea × Carex vacillans |
| Species | Carex paysonis |
| Species | Carex podocarpa |
| Species | Carex ramenskii |
| Species | Carex recta |
| Species | Carex recta × Carex stricta |
| Species | Carex rufina |
| Species | Carex salina |
| Species | Carex scopulorum |
| Species | Carex spectabilis |
| Species | Carex stricta |
| Species | Carex subspathacea |
| Species | Carex torta |
| Species | Carex vacillans |
| Species | Carex ×arctophila |
| Species | Carex ×crinitoides |
| Species | Carex ×dumanii |
| Species | Carex ×exsalina |
| Species | Carex ×flavicans |
| Species | Carex ×grantii |
| Species | Carex ×groenlandica |
| Species | Carex ×haematolepis |
| Species | Carex ×limula |
| Species | Carex ×mendica |
| Species | Carex ×nearctica |
| Species | Carex ×neobigelowii |
| Species | Carex ×neofilipendula |
| Species | Carex ×neorigida |
| Species | Carex ×persalina |
| Species | Carex ×reducta |
| Species | Carex ×rollandii |
| Species | Carex ×saxenii |
| Species | Carex ×spiculosa |
| Species | Carex ×subpaleacea |
| Species | Carex ×subrecta |
| Species | Carex ×ungavensis |
| Section | Carex sect. Phaestoglochin |
| Species | Carex aggregata |
| Species | Carex appalachica |
| Species | Carex cephaloidea |
| Species | Carex cephalophora |
| Species | Carex divulsa |
| Species | Carex gravida |
| Species | Carex hoodii |
| Species | Carex hookeriana |
| Species | Carex leavenworthii |
| Species | Carex leersii |
| Species | Carex mesochorea |
| Species | Carex muehlenbergii |
| Species | Carex muricata |
| Species | Carex radiata |
| Species | Carex retroflexa |
| Species | Carex rosea |
| Species | Carex sparganioides |
| Species | Carex spicata |
| Species | Carex tumulicola |
| Species | Carex vallicola |
| Section | Carex sect. Phyllostachyae |
| Species | Carex backii |
| Species | Carex cordillerana |
| Species | Carex jamesii |
| Species | Carex juniperorum |
| Species | Carex saximontana |
| Species | Carex willdenowii |
| Section | Carex sect. Physoglochin |
| Species | Carex gynocrates |
| Species | Carex parallela |
| Section | Carex sect. Porocystis |
| Species | Carex hirsutella |
| Species | Carex pallescens |
| Species | Carex swanii |
| Species | Carex torreyi |
| Species | Carex virescens |
| Section | Carex sect. Racemosae |
| Species | Carex adelostoma |
| Species | Carex albonigra |
| Species | Carex atrata |
| Species | Carex atratiformis |
| Species | Carex atrosquama |
| Species | Carex atrosquama × Carex media |
| Species | Carex buxbaumii |
| Species | Carex epapillosa |
| Species | Carex gmelinii |
| Species | Carex hallii |
| Species | Carex holostoma |
| Species | Carex media |
| Species | Carex media × Carex norvegica |
| Species | Carex mertensii |
| Species | Carex norvegica |
| Species | Carex parryana |
| Species | Carex raynoldsii |
| Species | Carex sabulosa |
| Species | Carex stylosa |
| Species | Carex ×payettei |
| Species | Carex ×quirponensis |
| Species | Carex ×sardloquensis |
| Section | Carex sect. Rhynchocystis |
| Species | Carex pendula |
| Section | Carex sect. Rostrales |
| Species | Carex folliculata |
| Species | Carex michauxiana |
| Section | Carex sect. Rupestres |
| Species | Carex rupestris |
| Section | Carex sect. Scirpinae |
| Species | Carex scirpoidea |
| Section | Carex sect. Shortianae |
| Species | Carex shortiana |
| Section | Carex sect. Spirostachyae |
| Species | Carex distans |
| Section | Carex sect. Squarrosae |
| Species | Carex frankii |
| Species | Carex squarrosa |
| Species | Carex typhina |
| Section | Carex sect. Stellulatae |
| Species | Carex atlantica |
| Species | Carex echinata |
| Species | Carex echinata subsp. echinata × Carex exilis |
| Species | Carex exilis |
| Species | Carex interior |
| Species | Carex interior × Carex sterilis |
| Species | Carex seorsa |
| Species | Carex sterilis |
| Species | Carex wiegandii |
| Species | Carex ×minganinsularum |
| Section | Carex sect. Thuringiaca |
| Species | Carex flacca |
| Section | Carex sect. Vesicariae |
| Species | Carex baileyi |
| Species | Carex bullata |
| Species | Carex comosa |
| Species | Carex exsiccata |
| Species | Carex exsiccata × Carex rostrata |
| Species | Carex hystericina |
| Species | Carex lurida |
| Species | Carex membranacea |
| Species | Carex oligosperma |
| Species | Carex pseudocyperus |
| Species | Carex retrorsa |
| Species | Carex rostrata |
| Species | Carex rotundata |
| Species | Carex saxatilis |
| Species | Carex schweinitzii |
| Species | Carex tuckermanii |
| Species | Carex utriculata |
| Species | Carex vesicaria |
| Species | Carex ×hartii |
| Species | Carex ×involuta |
| Species | Carex ×massonii |
| Species | Carex ×physocarpoides |
| Species | Carex ×saamica |
| Species | Carex ×stenolepis |
| Section | Carex sect. Vulpinae |
| Species | Carex alopecoidea |
| Species | Carex crus-corvi |
| Species | Carex jonesii |
| Species | Carex laevivaginata |
| Species | Carex stipata |
