Canada's Plant Hardiness Site

Data have been entered for 7138 species.

(Last updated Wed Jan 14 11:46:39 EST 2015)
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Cabomba caroliniana
Cakile edentula searocket
Cakile edentula subsp. edentula var. lacustris searocket
Calamagrostis arundinacea rough reedgrass
Calamagrostis arundinacea var. brachytricha Korean feather reedgrass
Calamagrostis canadensis bluejoint reedgrass
Calamagrostis canadensis var. canadensis bluejoint reedgrass
Calamagrostis canadensis var. macouniana Macoun's reedgrass
Calamagrostis cinnoides small reedgrass
Calamagrostis epigejos chee reedgrass
Calamagrostis lapponica Lapland reedgrass
Calamagrostis montanensis plains reedgrass
Calamagrostis pickeringii Pickering's reedgrass
Calamagrostis porteri Porter's reedgrass
Calamagrostis porteri subsp. insperata Bartley's reedgrass
Calamagrostis purpurascens purple reedgrass
Calamagrostis rubescens pine reedgrass
Calamagrostis stricta slimstem reedgrass
Calamagrostis stricta subsp. inexpansa northern reedgrass
Calamagrostis stricta subsp. stricta slimstem reedgrass
Calamagrostis Xacutiflora feather reedgrass
Calamovilfa arcuata Cumberland sandreed
Calamovilfa brevipilis pinebarren sandreed
Calamovilfa curtissii Florida sandreed
Calamovilfa longifolia prairie sandreed
Calamovilfa longifolia var. longifolia prairie sandreed
Calamovilfa longifolia var. magna Great Lakes sandreed
Calandrinia ciliata desert rock purslane
Calendula officinalis pot marigold
Calla palustris water arum
Callicarpa bodinieri bodinier beautyberry
Callicarpa dichotoma purple beautyberry
Callicarpa japonica Japanese beautyberry
Callirhoë digitata finger poppy-mallow
Callirhoë involucrata low poppy-mallow
Callirhoë triangulata clustered poppy-mallow
Callitriche hermaphroditica autumnal water-starwort
Callitriche heterophylla large water-starwort
Callitriche marginata
Callitriche palustris marsh water-starwort
Callitriche terrestris
Calluna vulgaris Scottish heather
Calocedrus decurrens white cedar
Calochortus apiculatus threespot mariposa lily
Calochortus clavatus var. avius
Calochortus excavatus
Calochortus greenei Greene's mariposa lily
Calochortus longebarbatus var. longebarbatus
Calochortus longebarbatus var. peckii
Calochortus nitidus
Calochortus plummerae
Calochortus striatus
Calochortus weedii var. intermedius
Calopogon tuberosus tuberous grasspink
Calopogon tuberosus var. tuberosus tuberous grasspink
Caltha leptosepala white marsh marigold
Caltha natans floating marsh marigold
Caltha palustris cowflock
Calycadenia villosa dwarf calycadenia
Calycanthus floridus Carolina allspice
Calycanthus floridus var. floridus sweetshrub
Calycanthus floridus var. glaucus sweetshrub
Calycanthus occidentalis California sweetshrub
Calydorea coelestina
Calypso bulbosa calypso
Calypso bulbosa var. americana calypso
Calystegia catesbeiana Catesby's false bindweed
Calystegia hederacea Japanese false bindweed
Calystegia sepium wild morning glory
Calystegia sepium subsp. americana American hedge bindweed
Calystegia sepium subsp. angulata trailing hedge bindweed
Calystegia sepium subsp. sepium hedge bindweed
Calystegia silvatica short-stalked false bindweed
Calystegia silvatica subsp. fraterniflora short-stalked false bindweed
Calystegia spithamaea low bindweed
Calystegia spithamaea subsp. purshiana low false bindweed
Calystegia spithamaea subsp. spithamaea low bindweed
Camassia cusickii Cusick’s camas
Camassia leichtlinii great camas
Camassia quamash common camas
Camassia scilloides eastern camas
Camelina microcarpa hairy falseflax
Camelina sativa gold-of-pleasure
Camellia japonica Japanese camellia
Camellia oleifera tea-oil camellia
Camellia sasanqua sasanqua camellia
Camellia sinensis tea
Camellia Xwilliamsii hybrid camellia
Campanula americana American bellflower
Campanula aparinoides marsh bellflower
Campanula californica California swamp harebell
Campanula carpatica tussock bellflower
Campanula cochleariifolia earleaf bellflower
Campanula garganica Adriatic bellflower
Campanula glomerata clustered bellflower
Campanula lactiflora European bellflower
Campanula lasiocarpa mountain bellflower
Campanula latifolia giant bellflower
Campanula medium Canterbury bellflower
Campanula persicifolia peachleaf bellflower
Campanula portenschlagiana Dalmatian bellflower
Campanula poscharskyana trailing bellflower
Campanula punctata spotted bellflower
Campanula rapunculoides creeping bellflower
Campanula rotundifolia Scottish bluebell
Campanula scouleri Scouler's bellflower
Campanula takesimana Korean bellflower
Campanula trachelium nettleleaf bellflower
Campanula uniflora arctic bellflower
Campsis radicans trumpet creeper
Campsis Xtagliabuana hybrid trumpetcreeper
Canadanthus modestus great northern aster
Canna Xgeneralis canna lily
Cannabis sativa hemp
Capnoides sempervirens rock harlequin
Capsella bursa-pastoris pickpocket
Caragana arborescens pea tree
Caragana erinacea Maximowicz's peashrub
Caragana frutex Russian peashrub
Caragana pygmaea pygmy peashrub
Cardamine bellidifolia alpine bittercress
Cardamine bulbosa bulbous cress
Cardamine clematitis
Cardamine concatenata cutleaf toothwort
Cardamine constancei
Cardamine diphylla crinkleroot
Cardamine dissecta
Cardamine douglassii limestone bittercress
Cardamine flexuosa
Cardamine hirsuta hairy bittercress
Cardamine impatiens
Cardamine longii
Cardamine maxima threeleaf toothwort
Cardamine nymanii meadow bittercress
Cardamine oligosperma little western bittercress
Cardamine parviflora smallflowered bittercress
Cardamine pensylvanica Quaker bittercress
Cardamine pratensis meadow bittercress
Cardiocrinum giganteum giant himalayan lily
Carduus acanthoides spiny plumeless thistle
Carduus nutans nodding thistle
Carduus nutans subsp. leiophyllus smoothleaf nodding thistle
Carduus nutans subsp. nutans nodding thistle
Carex acutiformis lesser pond sedge
Carex adelostoma circumpolar sedge
Carex adusta lesser brown sedge
Carex aggregata smooth clustered sedge
Carex alata broadwing sedge
Carex albicans white-tinged sedge
Carex albicans var. albicans white-tinged sedge
Carex albicans var. emmonsii Emmons' sedge
Carex albonigra black-and-white-scale sedge
Carex albursina white bear sedge
Carex alopecoidea foxtail sedge
Carex amphibola eastern narrowleaf sedge
Carex amplifolia bigleaf sedge
Carex annectens yellowfruit sedge
Carex anthoxanthea yellowflower sedge
Carex aperta open sedge
Carex appalachica Appalachian sedge
Carex aquatilis water sedge
Carex aquatilis var. aquatilis water sedge
Carex aquatilis var. substricta calcareous water sedge
Carex arcta northern clustered sedge
Carex arctata drooping woodland sedge
Carex argyrantha silvery hay sedge
Carex assiniboinensis Assiniboia sedge
Carex atherodes wheat sedge
Carex athrostachya slenderbeak sedge
Carex atlantica Atlantic sedge
Carex atlantica subsp. atlantica Atlantic sedge
Carex atlantica subsp. capillacea eastern sedge
Carex atratiformis scabrous black sedge
Carex atrofusca darkbrown sedge
Carex atrosquama lesser blackscale sedge
Carex aurea golden sedge
Carex backii Back's sedge
Carex baileyi Bailey's sedge
Carex barrattii Barratt's sedge
Carex bebbii Bebb's sedge
Carex bicknellii Bicknell's sedge
Carex bicknellii var. bicknellii Bicknell's sedge
Carex bicolor twocolour sedge
Carex bigelowii Bigelow's sedge
Carex bigelowii subsp. bigelowii Bigelow's sedge
Carex biltmoreana Biltmore sedge
Carex blanda woodland sedge
Carex brevicaulis shortstem sedge
Carex brevior shortbeak sedge
Carex bromoides bromelike sedge
Carex bromoides subsp. bromoides bromelike sedge
Carex brunnescens brownish sedge
Carex brunnescens subsp. brunnescens brown sedge
Carex brunnescens subsp. sphaerostachya roundspike brownish sedge
Carex buchananii leatherleaf sedge
Carex bullata button sedge
Carex bushii longscale green sedge
Carex buxbaumii brown bog sedge
Carex canescens hoary sedge
Carex canescens subsp. canescens hoary sedge
Carex canescens subsp. disjuncta disjunct hoary sedge
Carex capillaris hairlike sedge
Carex capitata capitate sedge
Carex careyana Carey's sedge
Carex caryophyllea spring sedge
Carex castanea chestnut sedge
Carex cephaloidea thinleaf sedge
Carex cephalophora ovalhead sedge
Carex chordorrhiza cordroot sedge
Carex circinata coiled sedge
Carex communis fibrous-root sedge
Carex communis var. communis fibrous-root sedge
Carex comosa bristly sedge
Carex concinna northern elegant sedge
Carex concinnoides northwest sedge
Carex conica Japanese sedge
Carex conoidea openfield sedge
Carex cordillerana Cordilleran sedge
Carex crawei Crawe's sedge
Carex crawfordii Crawford's sedge
Carex crinita fringed sedge
Carex crinita var. crinita fringed sedge
Carex cristatella crested oval sedge
Carex crus-corvi ravensfoot sedge
Carex cryptolepis hiddenscale sedge
Carex cumulata clustered sedge
Carex cusickii Cusick's sedge
Carex davisii Davis’ sedge
Carex debilis slenderstalk sedge
Carex debilis var. debilis white-edge sedge
Carex debilis var. rudgei Rudge's sedge
Carex decomposita cypressknee sedge
Carex deflexa northern oak sedge
Carex deflexa var. deflexa bent northern sedge
Carex deweyana Dewey's sedge
Carex deweyana var. deweyana Dewey's sedge
Carex diandra lesser panicled sedge
Carex digitalis slender wood sedge
Carex disperma two-seeded sedge
Carex disticha two-ranked sedge
Carex divulsa grey sedge
Carex douglasii Douglas' sedge
Carex duriuscula needleleaf sedge
Carex eburnea bristleleaf sedge
Carex echinata star sedge
Carex echinata subsp. echinata little prickly sedge
Carex elata Bowles' golden sedge
Carex eleusinoides goosegrass sedge
Carex emoryi Emory's sedge
Carex engelmannii Engelmann's sedge
Carex epapillosa blackened sedge
Carex exilis coastal sedge
Carex exsiccata western inflated sedge
Carex festucacea fescue sedge
Carex filifolia sheeps-wool sedge
Carex flacca glaucous sedge
Carex flava yellow sedge
Carex foenea Fernald's hay sedge
Carex folliculata northern long sedge
Carex formosa awnless graceful sedge
Carex frankii bristly cattail sedge
Carex fuliginosa shortleaf sedge
Carex garberi Garber's sedge
Carex geyeri Geyer's sedge
Carex glacialis Newfoundland sedge
Carex glareosa weak clustered sedge
Carex glareosa subsp. glareosa weak clustered sedge
Carex glaucodea blue sedge
Carex gracilescens slender wood sedge
Carex gracillima graceful sedge
Carex granularis granular sedge
Carex gravida heavy sedge
Carex grayi Gray's sedge
Carex grisea gray sedge
Carex gynandra nodding sedge
Carex gynocrates northern bog sedge
Carex hallii Hall's sedge
Carex hassei salt sedge
Carex haydeniana cloud sedge
Carex haydenii Hayden's sedge
Carex heleonastes Hudson Bay sedge
Carex hendersonii Henderson's sedge
Carex hirsutella hirsute sedge
Carex hirta hairy sedge
Carex hirtifolia hairyleaf sedge
Carex hitchcockiana Hitchcock's sedge
Carex holostoma Arctic marsh sedge
Carex hoodii Hood's sedge
Carex hookeriana Hooker's sedge
Carex hormathodes marsh straw sedge
Carex hostiana Host's sedge
Carex houghtoniana Houghton's sedge
Carex hyalinolepis hyaline-scaled sedge
Carex hystericina bottlebrush sedge
Carex idahoa
Carex illota smallhead sedge
Carex incurviformis curved-spike sedge
Carex infirminervia weak-nerved sedge
Carex inops subsp. heliophila sun-loving sedge
Carex interior inland sedge
Carex intumescens greater bladder sedge
Carex jamesii grass sedge
Carex juniperorum cedar sedge
Carex krausei Krause's sedge
Carex lachenalii Arctic hare's-foot sedge
Carex lacustris lake sedge
Carex laeviconica smoothfruit sedge
Carex laeviculmis smooth sedge
Carex laevivaginata smoothsheath sedge
Carex lapponica Lapland sedge
Carex lasiocarpa narrowleaf woolly sedge
Carex lasiocarpa subsp. americana
Carex latebracteata
Carex laxa weak sedge
Carex laxiculmis weakstem wood sedge
Carex laxiculmis var. laxiculmis weakstem wood sedge
Carex laxiflora broad looseflower sedge
Carex leavenworthii dwarf bracted sedge
Carex lenticularis tufted sedge
Carex lenticularis var. dolia goosegrass sedge
Carex lenticularis var. lenticularis tufted sedge
Carex lenticularis var. limnophila Hinds' sedge
Carex leptalea Harper's sedge
Carex leptonervia nerveless woodland sedge
Carex leptopoda taperfruit shortscale sedge
Carex limosa bog sedge
Carex livida livid sedge
Carex longii round-shouldered oval sedge
Carex lucorum distant sedge
Carex lupuliformis false hop sedge
Carex lupulina hop sedge
Carex lurida sallow sedge
Carex luzulina woodrush sedge
Carex luzulina var. ablata serrate sedge
Carex lyngbyei Lyngbye's sedge
Carex mackenziei Mackenzie's sedge
Carex macloviana thickhead sedge
Carex macrochaeta large-awn sedge
Carex magellanica bog sedge
Carex magellanica subsp. irrigua bog sedge
Carex manhartii
Carex marina sea sedge
Carex maritima curved sedge
Carex meadii Mead's stiff sedge
Carex media closed-head sedge
Carex merritt-fernaldii Fernald's sedge
Carex mertensii Mertens' sedge
Carex mesochorea midland bracted sedge
Carex michauxiana Michaux's sedge
Carex microglochin bristle sedge
Carex micropoda smallroot sedge
Carex microptera ovalhead sedge
Carex misera
Carex mitchelliana
Carex molesta field oval sedge
Carex morrowii Japanese sedge
Carex muehlenbergii Muhlenberg's sedge
Carex muehlenbergii var. enervis sand sedge
Carex muehlenbergii var. muehlenbergii sand sedge
Carex muricata lesser prickly sedge
Carex muskingumensis muskingum sedge
Carex nardina nard sedge
Carex nebrascensis Nebraska sedge
Carex nigra smooth black sedge
Carex nigricans black alpine sedge
Carex nigromarginata
Carex normalis larger straw sedge
Carex norvegica Scandinavian sedge
Carex novae-angliae New England sedge
Carex obtusata dryland blunt sedge
Carex oligocarpa
Carex oligosperma fewseed sedge
Carex ormostachya necklace spike sedge
Carex oronensis
Carex oshimensis variegated Japanese sedge
Carex ovalis oval sedge
Carex pachystachya Chamisso's sedge
Carex paleacea chaffy sedge
Carex pallescens pale sedge
Carex panicea
Carex parryana Parry's sedge
Carex pauciflora fewflowered sedge
Carex paysonis Payson's sedge
Carex peckii Peck's oak sedge
Carex pedunculata longstalk sedge
Carex pellita broadleaf woolly sedge
Carex pendula drooping sedge
Carex pensylvanica common oak sedge
Carex petasata pasture sedge
Carex petricosa rock sedge
Carex petricosa var. misandroides rock sedge
Carex petricosa var. petricosa rock sedge
Carex phaeocephala dunhead sedge
Carex plantaginea seersucker sedge
Carex platyphylla broadleaf sedge
Carex pluriflora several-flowered sedge
Carex podocarpa shortstalk sedge
Carex polymorpha
Carex praeceptorum early sedge
Carex praegracilis expressway sedge
Carex prairea prairie sedge
Carex prasina drooping sedge
Carex praticola northern meadow sedge
Carex preslii Presl's sedge
Carex projecta necklace sedge
Carex pseudocyperus cyperus sedge
Carex purpurifera purple sedge
Carex radiata eastern star sedge
Carex rariflora looseflowered alpine sedge
Carex raynoldsii Raynolds' sedge
Carex recta estuary sedge
Carex retroflexa reflexed sedge
Carex retrorsa retrorse sedge
Carex richardsonii Richardson's sedge
Carex roanensis mountain sedge
Carex rosea rosy sedge
Carex rossii Ross's sedge
Carex rostrata bottlebrush sedge
Carex rupestris curly sedge
Carex ruthii Ruth's sedge
Carex sabulosa sand sedge
Carex salina saltmarsh sedge
Carex sartwellii Sartwell's sedge
Carex saxatilis russet sedge
Carex saximontana Rocky Mountain sedge
Carex scabrata scabrous sedge
Carex schweinitzii Schweinitz's sedge
Carex scirpoidea scirpus sedge
Carex scirpoidea subsp. convoluta northern singlespike sedge
Carex scirpoidea subsp. pseudoscirpoidea western singlespike sedge
Carex scirpoidea subsp. scirpoidea northern singlespike sedge
Carex scirpoidea subsp. stenochlaena lancefruit singlespike sedge
Carex scoparia pointed broom sedge
Carex scoparia var. scoparia pointed broom sedge
Carex scopulorum Holm's Rocky Mountain sedge
Carex scopulorum var. prionophylla firethread sedge
Carex seorsa swamp star sedge
Carex shortiana Short's sedge
Carex siccata silvery hay sedge
Carex siderosticha broad-leaved sedge
Carex silicea seabeach sedge
Carex simulata shortbeaked sedge
Carex sparganioides burreed sedge
Carex spectabilis northwestern showy sedge
Carex spicata spiked sedge
Carex sprengelii long-beak sedge
Carex squarrosa narrowleaf cattail sedge
Carex sterilis dioecious sedge
Carex stipata common fox sedge
Carex stricta hummock sedge
Carex stylosa variegated sedge
Carex suberecta wedge-fruited oval sedge
Carex subspathacea Hoppner's sedge
Carex supina weak arctic sedge
Carex supina subsp. spaniocarpa weak arctic sedge
Carex swanii downy green sedge
Carex sychnocephala dense longbeaked sedge
Carex sylvatica European woodland sedge
Carex tenera quill sedge
Carex tenera var. echinodes quill sedge
Carex tenera var. tenera quill sedge
Carex tenuiflora sparseflowered sedge
Carex tetanica rigid sedge
Carex tincta tinged oval sedge
Carex tonsa shaved sedge
Carex tonsa var. rugosperma rough-fruited deepgreen sedge
Carex tonsa var. tonsa shaved sedge
Carex torreyi Torrey's sedge
Carex torta beaked riverbank sedge
Carex tribuloides blunt broom sedge
Carex tribuloides var. tribuloides blunt broom sedge
Carex trichocarpa velvet sedge
Carex trisperma three-fruit sedge
Carex tuckermanii Tuckerman's sedge
Carex typhina common cattail sedge
Carex umbellata parasol sedge
Carex utriculata bottle sedge
Carex vacillans estuarine sedge
Carex vaginata sheathed sedge
Carex vallicola valley sedge
Carex vesicaria inflated sedge
Carex virescens ribbed sedge
Carex viridula little green sedge
Carex viridula subsp. oedocarpa Oeder's sedge
Carex viridula subsp. viridula little green sedge
Carex vulpinoidea brown fox sedge
Carex wiegandii Wiegand's sedge
Carex willdenowii Willdenow's sedge
Carex williamsii Williams' sedge
Carex woodii pretty sedge
Carex Xknieskernii Knieskern's hybrid sedge
Carex Xruedtii hybrid sedge
Carex Xstenolepis Anticosti sedge
Carex Xtrichina
Carex xerantica dryland sedge
Carlina acaulis carline thistle
Carnegiea gigantea saguaro
Carpenteria californica California carpenteria
Carpinus betulus European hornbeam
Carpinus caroliniana blue beech
Carpinus caroliniana var. virginiana American hornbeam
Carpinus cordata heartleaf hornbeam
Carpinus coreana Korean hornbeam
Carpinus japonica Japanese hornbeam
Carpinus laxiflora loose-flower hornbeam
Carpinus orientalis Oriental hornbeam
Carpinus tschonoskii yeddo hornbeam
Carpinus turczaninowii Korean hornbeam
Carum carvi wild caraway
Carya aquatica water hickory
Carya cordiformis bitternut hickory
Carya glabra pignut hickory
Carya illinoinensis pecan
Carya laciniosa shellbark hickory
Carya myristiciformis nutmeg hickory
Carya ovata shagbark hickory
Carya ovata var. australis Carolina shagbark hickory
Carya ovata var. ovata shagbark hickory
Carya pallida sand hickory
Carya texana black hickory
Carya tomentosa mockernut hickory
Caryopteris hispida var. fertilis blue spiraea
Caryopteris incana common bluebeard
Cassiope lycopodioides clubmoss mountain heather
Cassiope mertensiana western mountain heather
Cassiope tetragona four-angle mountain heather
Castanea dentata American chestnut
Castanea mollissima Chinese chestnut
Castanea ozarkensis Ozark chinkapin
Castanea pumila dwarf chestnut
Castanea sativa Spanish chestnut
Castilleja campestris subsp. succulenta
Castilleja cervina
Castilleja chlorotica
Castilleja coccinea scarlet paintedcup
Castilleja cusickii
Castilleja hispida
Castilleja levisecta
Castilleja lutescens
Castilleja miniata minute paintedcup
Castilleja minor subsp. minor
Castilleja occidentalis
Castilleja pallescens
Castilleja parviflora
Castilleja raupii Raup's paintedcup
Castilleja rhexiifolia
Castilleja rupicola
Castilleja septentrionalis Labrador paintbrush
Castilleja sessiliflora
Castilleja thompsonii
Casuarina equisetifolia horsetail tree
Catabrosa aquatica water whorlgrass
Catalpa bignonioides southern catalpa
Catalpa bungei Manchurian catalpa
Catalpa ovata Chinese catalpa
Catalpa speciosa northern catalpa
Catananche caerulea cupid's-dart
Caulophyllum giganteum giant blue cohosh
Caulophyllum thalictroides blue cohosh
Ceanothus americanus New Jersey tea
Ceanothus herbaceus narrowleaf New Jersey tea
Ceanothus integerrimus deerbrush
Ceanothus prostratus pinemat
Ceanothus sanguineus redstem ceanothus
Ceanothus thyrsiflorus California wild lilac
Ceanothus velutinus snowbrush
Cedrus atlantica Algerian cedar
Cedrus deodara Himalayan cedar
Cedrus libani Lebanese cedar
Celastrus orbiculatus Oriental bittersweet
Celastrus scandens American bittersweet
Celtis biondii nettle tree
Celtis jessoensis Japanese hackberry
Celtis laevigata sugarberry
Celtis lindheimeri Lindheimer's hackberry
Celtis occidentalis common hackberry
Celtis reticulata netleaf hackberry
Celtis tenuifolia dwarf hackberry
Cenchrus longispinus longspine sandbur
Centaurea benedicta blessed thistle
Centaurea calcitrapa purple starthistle
Centaurea cyanus bachelor's button
Centaurea diffusa diffuse knapweed
Centaurea jacea brown knapweed
Centaurea macrocephala globe knapweed
Centaurea montana mountain cornflower
Centaurea nigra lesser knapweed
Centaurea nigrescens Tyrol knapweed
Centaurea scabiosa scabious knapweed
Centaurea stoebe subsp. micranthos spotted knapweed
Centaurium erythraea European centaury
Centaurium pulchellum branched centaury
Centranthus ruber red valerian
Cephalanthus occidentalis common buttonbush
Cephalaria gigantea giant yellow scabious
Cephalotaxus harringtonia cow's-tail pine
Cerastium alpinum alpine chickweed
Cerastium alpinum subsp. lanatum woolly alpine chickweed
Cerastium arvense field mouse-ear chickweed
Cerastium arvense subsp. arvense field mouse-ear chickweed
Cerastium arvense subsp. strictum meadow mouse-ear chickweed
Cerastium beeringianum Bering mouse-ear chickweed
Cerastium brachypodum shortstalk mouse-ear chickweed
Cerastium fontanum common mouse-ear chickweed
Cerastium fontanum subsp. vulgare common mouse-ear chickweed
Cerastium glomeratum sticky mouse-ear chickweed
Cerastium maximum great chickweed
Cerastium nutans nodding mouse-ear chickweed
Cerastium nutans var. nutans nodding mouse-ear chickweed
Cerastium pumilum European chickweed
Cerastium semidecandrum five-stamen mouse-ear chickweed
Cerastium tomentosum snow-on-the-mountain
Cerastium velutinum large field chickweed
Ceratophyllum demersum common hornwort
Ceratophyllum echinatum spiny hornwort
Ceratostigma plumbaginoides blue leadwort
Cercidiphyllum japonicum katsura-tree
Cercis canadensis Judas-tree
Cercis canadensis var. canadensis Judas-tree
Cercis canadensis var. texensis Texas redbud
Cercis chinensis western redbud
Cercis occidentalis western redbud
Cercis siliquastrum lovetree
Cercocarpus ledifolius curl-leaf mountain-mahogany
Chaenactis douglasii Douglas' dustmaiden
Chaenomeles japonica Japanese flowering quince
Chaenomeles speciosa flowering quince
Chaenorhinum minus dwarf snapdragon
Chaerophyllum procumbens creeping chervil
Chaerophyllum procumbens var. procumbens creeping chervil
Chaerophyllum procumbens var. shortii
Chamaecyparis lawsoniana Oregon cedar
Chamaecyparis obtusa Hinoki cypress
Chamaecyparis pisifera sawara false-cypress
Chamaecyparis thyoides Atlantic white-cedar
Chamaecytisus hirsutus hairy broom
Chamaedaphne calyculata leatherleaf
Chamaelirium luteum fairywand
Chamaemelum nobile Roman chamomile
Chamaerhodos erecta Nuttall's little rose
Chamaerops humilis European fan palm
Chamaesyce glyptosperma ridge-seeded milk-purslane
Chamaesyce maculata spotted milk-purslane
Chamaesyce polygonifolia seaside spurge
Chamaesyce serpyllifolia thymeleaf broomspurge
Chamaesyce vermiculata wormseed spurge
Chamerion angustifolium French willow
Chamerion angustifolium subsp. angustifolium fireweed
Chamerion angustifolium subsp. circumvagum fireweed
Chamerion latifolium alpine fireweed
Chasmanthium latifolium broadleaf chasmanthium
Cheilanthes feei slender lip fern
Cheilanthes gracillima lace lip fern
Cheilanthes lanosa woolly lip fern
Chelidonium majus greater celandine
Chelone glabra white turtlehead
Chelone lyonii Lyon's turtlehead
Chelone obliqua rose turtlehead
Chenopodium album lamb's-quarters
Chenopodium atrovirens darkgreen goosefoot
Chenopodium berlandieri pitseed goosefoot
Chenopodium berlandieri var. bushianum village goosefoot
Chenopodium berlandieri var. macrocalycium large-calyx goosefoot
Chenopodium berlandieri var. zschackei Zschacke's goosefoot
Chenopodium bonus-henricus good King Henry
Chenopodium capitatum strawberry blite
Chenopodium foggii Fogg's goosefoot
Chenopodium fremontii Fremont's goosefoot
Chenopodium glaucum oakleaf goosefoot
Chenopodium glaucum subsp. salinum Rocky mountain goosefoot
Chenopodium incanum hoary goosefoot
Chenopodium incanum var. incanum hoary goosefoot
Chenopodium leptophyllum slimleaf lambsquarters
Chenopodium murale Australian spinach
Chenopodium polyspermum manyseed goosefoot
Chenopodium polyspermum var. acutifolium manyseeded goosefoot
Chenopodium pratericola narrowleaf goosefoot
Chenopodium rubrum red goosefoot
Chenopodium rubrum var. rubrum coast blite
Chenopodium simplex mapleleaf goosefoot
Chenopodium standleyanum woodland goosefoot
Chenopodium strictum striped goosefoot
Chenopodium strictum var. glaucophyllum
Chenopodium subglabrum smooth narrowleaf goosefoot
Chenopodium urbicum upright goosefoot
Chenopodium watsonii Watson's goosefoot
Chiastophyllum oppositifolium cotyledon
Chimaphila maculata striped pipsissewa
Chimaphila menziesii Menzies' pipsissewa
Chimaphila umbellata pipsissewa
Chionanthus pygmaeus pygmy fringetree
Chionanthus retusus Chinese fringetree
Chionanthus virginicus grancy gray-beard
Chionodoxa forbesii glory-of-the-snow
Chionodoxa luciliae Boissier’s glory-of-the-snow
Choisya ternata Mexican mock orange
Chondrilla juncea rush skeletonweed
Chorispora tenella
Chorizanthe polygonoides var. longispina
Chrysanthemum Xmorifolium florist's chrysanthemum
Chrysanthemum Xrubellum Rubellum Hybrids
Chrysogonum virginianum green and gold
Chrysolepis chrysophylla golden-chestnut
Chrysopsis godfreyi
Chrysosplenium americanum American watermat
Chrysosplenium iowense Iowa golden carpet
Chrysosplenium tetrandrum northern golden saxifrage
Chrysothamnus viscidiflorus
Cichorium intybus wild chicory
Cicuta bulbifera bulb-bearing water hemlock
Cicuta douglasii western water hemlock
Cicuta maculata musquash-root
Cicuta maculata var. maculata
Cicuta maculata var. victorinii
Cicuta virosa Mackenzie's water hemlock
Cinna arundinacea stout woodreed
Cinna latifolia drooping woodreed
Cinnamomum camphora Camphor laurel
Circaea alpina dwarf enchanter's nightshade
Circaea alpina subsp. alpina small enchanter's nightshade
Circaea canadensis Canada enchanter's nightshade
Circaea canadensis subsp. canadensis broadleaf enchanter's nightshade
Circaea Xsterilis intermediate enchanter's nightshade
Cirsium arvense Canada thistle
Cirsium brevistylum shortstyle thistle
Cirsium carolinianum Carolina thistle
Cirsium discolor field thistle
Cirsium drummondii Drummond's thistle
Cirsium edule edible thistle
Cirsium flodmanii Flodman's thistle
Cirsium foliosum leafy thistle
Cirsium hookerianum Hooker's thistle
Cirsium horridulum horrid thistle
Cirsium horridulum var. horridulum horrid thistle
Cirsium japonicum Japanese thistle
Cirsium longistylum longstyle thistle
Cirsium muticum swamp thistle
Cirsium palustre marsh thistle
Cirsium pitcheri Pitcher's thistle
Cirsium pumilum pasture thistle
Cirsium pumilum var. hillii Hill's thistle
Cirsium scariosum meadow thistle
Cirsium undulatum wavyleaf thistle
Cirsium vinaceum
Cirsium vulgare bull thistle
Cistanthe umbellata Mount Hood pussypaws
Cistus laurifolius laurel rock rose
Cistus Xcyprius hybrid sun rose
Cistus Xpulverulentus hybrid sun rose
Cistus Xpurpureus hybrid sun rose
Citrullus colocynthis wild gourd
Cladium mariscoides smooth sawgrass
Cladrastis kentukea Kentucky yellowwood
Clarkia biloba subsp. brandegeeae
Clarkia pulchella
Clarkia rhomboidea
Claytonia caroliniana Carolina springbeauty
Claytonia cordifolia heartleaf springbeauty
Claytonia exigua subsp. glauca glaucous springbeauty
Claytonia lanceolata western springbeauty
Claytonia megarhiza alpine springbeauty
Claytonia multiscapa Rydberg's springbeauty
Claytonia scammaniana Scamman's springbeauty
Claytonia sibirica Siberian springbeauty
Claytonia virginica eastern springbeauty
Cleistes bifaria smaller spreading pogonia
Clematis alpina alpine virginsbower
Clematis armandii Armand's clematis
Clematis chiisanensis Korean clematis
Clematis cirrhosa fernleaf clematis
Clematis crispa curly clematis
Clematis flammula fragrant clematis
Clematis fremontii Fremont's leatherflower
Clematis heracleifolia bush clematis
Clematis hirsutissima hairy clematis
Clematis hirsutissima var. hirsutissima hairy clematis
Clematis integrifolia bush clematis
Clematis koreana Korean clematis
Clematis ligusticifolia western white clematis
Clematis macropetala largepetal clematis
Clematis montana mountain clematis
Clematis occidentalis purple clematis
Clematis occidentalis var. grosseserrata western blue clematis
Clematis occidentalis var. occidentalis purple clematis
Clematis orientalis Oriental clematis
Clematis recta upright clematis
Clematis serratifolia yellow clematis
Clematis tangutica golden clematis
Clematis terniflora sweet autumn clematis
Clematis texensis scarlet clematis
Clematis viorna vasevine
Clematis virginiana virginsbower
Clematis vitalba evergreen clematis
Clematis viticella Italian clematis
Clematis X'Western Virgin' prairie travelers' joy
Clematis Xjackmanii Jackman's clematis
Clematis Xjouiniana pillar clematis
Cleome multicaulis slender spiderflower
Clerodendron trichotomum harlequin glorybower
Clethra acuminata cinnamon clethra
Clethra alnifolia coastal sweet pepperbush
Clethra barbinervis tree clethra
Cliftonia monophylla black titi
Clinopodium acinos basil thyme
Clinopodium arkansanum wild calamint
Clinopodium ashei
Clinopodium douglasii
Clinopodium grandiflorum large-flowered calamint
Clinopodium nepta dwarf calamint
Clinopodium vulgare dogmint
Clintonia borealis cornlily
Clintonia uniflora singleflower clintonia
Clitoria fragrans
Clitoria mariana
Coccothrinax argentata Florida silver palm
Cocculus carolinus Carolina moonseed
Cochlearia groenlandica common scurvygrass
Cochlearia tridactylites
Codonopsis clematidea bonnet bellflower
Colchicum autumnale autumn crocus
Colchicum byzantinum Byzantine colchicum
Colchicum speciosum giant meadow saffron
Colchicum X'Waterlily' double-flowered autumn crocus
Collinsia parviflora smallflower blue-eyed Mary
Collinsia verna spring blue-eyed Mary
Collinsonia canadensis citronella
Collinsonia verticillata
Collomia grandiflora largeflower collomia
Collomia linearis narrowleaf collomia
Collomia mazama
Collomia tenella slender collomia
Colutea arborescens bladder senna
Comandra umbellata star toadflax
Comandra umbellata subsp. pallida pale bastard toadflax
Comarostaphylis diversifolia subsp. diversifolia mock arbutus
Comarum palustre marsh five-finger
Comastoma tenellum slender gentian
Commelina communis dayflower
Comptonia peregrina sweetfern
Conimitella williamsii William's conimitella
Conioselinum chinense hemlock parsley
Conium maculatum spotted hemlock
Conoclinium coelestinum blue mistflower
Conopholis americana cancerroot
Conradina grandiflora
Conradina verticillata
Conringia orientalis hare's-ear cabbage
Consolea corallicola semaphore pricklypear
Consolida ajacis rocket larkspur
Consolida regalis royal knight's-spur
Convallaria majalis European lily-of-the-valley
Convolvulus arvensis cornbine
Coptidium lapponicum Lapland buttercup
Coptidium pallasii Pallas' buttercup
Coptis aspleniifolia spleenwortleaf goldthread
Coptis trifolia goldthread
Corallorhiza maculata spotted coralroot
Corallorhiza maculata var. maculata spotted coralroot
Corallorhiza maculata var. occidentalis spotted coralroot
Corallorhiza odontorhiza
Corallorhiza striata striped coralroot
Corallorhiza striata var. striata striped coralroot
Corallorhiza trifida early coralroot
Corallorhiza wisteriana Wister’s coralroot
Cordylanthus maritimus subsp. palustris
Corema conradii broom crowberry
Coreopsis auriculata lobed tickseed
Coreopsis grandiflora largeflower tickseed
Coreopsis lanceolata lanceleaf tickseed
Coreopsis latifolia
Coreopsis palmata prairie tickseed
Coreopsis rosea pink tickseed
Coreopsis tinctoria golden tickseed
Coreopsis tripteris tall tickseed
Coreopsis verticillata threadleaf coreopsis
Coriandrum sativum cilantro
Corispermum americanum American bugseed
Corispermum americanum var. americanum American bugseed
Corispermum hookeri Hooker's bugseed
Corispermum hookeri var. hookeri Hooker's bugseed
Corispermum ochotense var. alaskanum
Corispermum pallasii Pallas' bugseed
Corispermum villosum hairy bugseed
Cornus alba Tatarian dogwood
Cornus alternifolia alternateleaf dogwood
Cornus amomum silky dogwood
Cornus amomum subsp. obliqua pale dogwood
Cornus asperifolia roughleaf dogwood
Cornus canadensis bunchberry
Cornus controversa giant dogwood
Cornus drummondii Drummond's dogwood
Cornus florida common white dogwood
Cornus foemina stiff dogwood
Cornus foemina subsp. racemosa gray dogwood
Cornus kousa Japanese dogwood
Cornus kousa subsp. chinenesis Chinese dogwood
Cornus macrophylla bigleaf dogwood
Cornus mas Cornelian cherry
Cornus nuttallii mountain dogwood
Cornus officinalis Asiatic dogwood
Cornus rugosa roundleaf dogwood
Cornus sanguinea bloodtwig dogwood
Cornus stolonifera red osier dogwood
Cornus suecica
Cornus unalaschkensis
Cornus walteri Walter's dogwood
Cornus Xintermedia
Cornus Xslavinii
Coronilla scorpioides yellow crown-vetch
Cortaderia selloana Uruguayan pampas grass
Corydalis aurea scrambled eggs
Corydalis aurea subsp. aurea
Corydalis caseana subsp. hastata
Corydalis elata blue corydalis
Corydalis flavula yellow corydalis
Corydalis flexuosa blue corydalis
Corydalis pauciflora few-flowered corydalis
Corydalis scouleri Scouler's corydalis
Corydalis solida pink fumewort
Corylopsis glabrescens fragrant winterhazel
Corylopsis sinensis Chinese winterhazel
Corylopsis spicata spike winterhazel
Corylus americana American filbert
Corylus avellana European filbert
Corylus colurna Turkish hazelnut
Corylus cornuta beaked hazelnut
Corylus cornuta subsp. californica western hazelnut
Corylus cornuta subsp. cornuta beaked filbert
Corynabutilon vitifolium abutilon
Coryphantha vivipara pincushion cactus
Cosmos atrosanguineus chocolate cosmos
Cosmos bipinnatus black cosmos
Cosmos sulphureus sulphur cosmos
Cota tinctoria yellow chamomile
Cotinus coggygria purple smokebush
Cotinus obovatus American smoke-tree
Cotinus X'Grace' grace smoke bush
Cotoneaster acutifolius Peking cotoneaster
Cotoneaster adpressus creeping cotoneaster
Cotoneaster apiculatus cranberry cotoneaster
Cotoneaster dammeri bearberry cotoneaster
Cotoneaster dielsianus
Cotoneaster divaricatus spreading cotoneaster
Cotoneaster horizontalis rock cotoneaster
Cotoneaster lucidus hedge cotoneaster
Cotoneaster multiflorus many-flowered cotoneaster
Cotoneaster racemiflorus
Cotoneaster salicifolius willowleaf cotoneaster
Cotula coronopifolia common brassbuttons
Crambe cordifolia colewort
Crambe maritima blue seakale
Crassula aquatica water pygmyweed
Crassula connata erect pygmyweed
Crataegus arborea Montgomery hawthorn
Crataegus berberifolia barberryleaf haw
Crataegus brainerdii Brainerd's hawthorn
Crataegus calpodendron blackthorn hawthorn
Crataegus canadensis
Crataegus chrysocarpa fireberry hawthorn
Crataegus chrysocarpa var. chrysocarpa fireberry hawthorn
Crataegus chrysocarpa var. phoenicea
Crataegus coccinea scarlet hawthorn
Crataegus coccinea var. fulleriana Fuller's hawthorn
Crataegus coccinea var. pringlei Pringle's thorn
Crataegus coccinioides Kansas hawthorn
Crataegus cognata
Crataegus compacta clustered hawthorn
Crataegus crus-galli cockspur hawthorn
Crataegus curvisepala
Crataegus disperma spreading hawthorn
Crataegus dodgei
Crataegus douglasii Douglas' hawthorn
Crataegus engelmannii Engelmann's hawthorn
Crataegus erythropoda chocolate haw
Crataegus flabellata Bosc's thorn
Crataegus grandis grand hawthorn
Crataegus harbisonii Harbison's hawthorn
Crataegus holmesiana Holmes' hawthorn
Crataegus intricata entangled hawthorn
Crataegus jonesiae Miss Jones' hawthorn
Crataegus kelloggii Kellogg's hawthorn
Crataegus laevigata English hawthorn
Crataegus lumaria roundleaf hawthorn
Crataegus macracantha long-spined hawthorn
Crataegus macracantha var. macracantha long-spined hawthorn
Crataegus macracantha var. occidentalis western fleshy hawthorn
Crataegus macrosperma bigfruit hawthorn
Crataegus magniflora shiningbranch hawthorn
Crataegus margarettae Margarett's hawthorn
Crataegus marshallii parsley hawthorn
Crataegus mollis downy hawthorn
Crataegus mollis var. meridionalis gallion hawthorn
Crataegus monogyna oneseed hawthorn
Crataegus nitida glossy hawthorn
Crataegus pennsylvanica Pennsylvania hawthorn
Crataegus perjucunda pearthorn
Crataegus phaenopyrum Washington thorn
Crataegus phippsii Phipp's hawthorn
Crataegus prona Illinois hawthorn
Crataegus pruinosa frosted hawthorn
Crataegus pruinosa var. dissona northern hawthorn
Crataegus pruinosa var. parvula
Crataegus punctata dotted hawthorn
Crataegus scabrida scabrid hawthorn
Crataegus schuettei Scheutte's hawthorn
Crataegus spathulata smallfruit hawthorn
Crataegus submollis Quebec hawthorn
Crataegus suborbiculata Caughuawaga hawthorn
Crataegus succulenta fleshy hawthorn
Crataegus triflora threeflower hawthorn
Crataegus turnerorum Turner's hawthorn
Crataegus uniflora dwarf hawthorn
Crataegus viridis green hawthorn
Crataegus warneri Warner's hawthorn
Crataegus wootoniana Wooton's hawthorn
Crataegus Xlavalleei Lavallée's hawthorn
Crataegus Xmordenensis Morden's hawthorn
Crepis atribarba dark hawksbeard
Crepis capillaris smooth hawksbeard
Crepis intermedia limestone hawksbeard
Crepis modocensis low hawksbeard
Crepis occidentalis western hawksbeard
Crepis runcinata dandelion hawksbeard
Crepis tectorum narrowleaf hawksbeard
Crinodendron hookerianum Chilean lantern tree
Crocanthemum bicknellii hoary frostweed
Crocanthemum dumosum bushy rockrose
Crocanthemum propinquum low frostweed
Crocosmia Xcrocosmiiflora montbretia
Crocus ancyrensis golden bunch crocus
Crocus cartwrightianus early bunch-flowering crocus
Crocus sativus saffron crocus
Crocus speciosus showy fall crocus
Crocus vernus large-flowered Dutch crocus
Croomia pauciflora
Crossopetalum ilicifolium
Croton capitatus
Croton elliottii
Crypsis schoenoides swamp pricklegrass
Cryptantha affinis common cryptantha
Cryptantha ambigua basin cryptantha
Cryptantha cana
Cryptantha celosioides buttecandle
Cryptantha fendleri Fendler's cryptantha
Cryptantha intermedia largeflower popcorn flower
Cryptantha minima tiny cryptantha
Cryptantha osterhoutii
Cryptantha torreyana Torrey's cat's-eye
Cryptogramma acrostichoides American parsleyfern
Cryptogramma stelleri Steller's rockbrake
Cryptomeria japonica Japanese cryptomeria
Cryptotaenia canadensis Canadian honewort
Cryptotaenia japonica Japanese parsley
Cucumis sativus gherkin
Cucurbita pepo zucchini
Cunninghamia lanceolata China fir
Cuphea viscosissima blue waxweed
Cupressus arizonica Arizona cypress
Cupressus arizonica var. glabra smooth cypress
Cupressus arizonica var. montana San Pedro Mártir cypress
Cupressus arizonica var. nevadensis Piute cypress
Cupressus arizonica var. stephensonii Stephenson's cypress
Cupressus bakeri Baker's cypress
Cupressus goveniana var. abramsiana Santa Cruz cypress
Cupressus goveniana var. goveniana Mendocino cypress
Cupressus goveniana var. pygmaea pygmy cypress
Cupressus guadalupensis var. forbesii Forbes' cypress
Cupressus macrocarpa Monterey cypress
Cuscuta cephalanthi buttonbush dodder
Cuscuta coryli hazel dodder
Cuscuta epithymum clover dodder
Cuscuta gronovii common dodder
Cuscuta pentagona five-angled dodder
Cuscuta polygonorum smartweed dodder
Cyclachaena xanthiifolia false ragweed
Cyclamen coum winter cyclamen
Cyclamen hederifolium ivyleaf cyclamen
Cycloloma atriplicifolium winged pigweed
Cydonia oblonga edible quince
Cylindropuntia davisii Davis' cholla
Cylindropuntia imbricata tree cholla
Cymbalaria muralis ivyleaf toadflax
Cymophyllus fraserianus
Cymopterus deserticola desert cymopterus
Cymopterus glomeratus plains spring parsley
Cynanchum laeve climbing milkweed
Cynanchum louiseae black swallowwort
Cynanchum rossicum European swallowwort
Cynara cardunculus globe artichoke
Cynodon dactylon Bermuda grass
Cynoglossum officinale beggar's-lice
Cynoglossum virginianum wild comfrey
Cynoglossum virginianum var. boreale northern houndstongue
Cynosurus cristatus crested dogtail
Cyperus acuminatus
Cyperus bipartitus shining flatsedge
Cyperus dentatus toothed flatsedge
Cyperus diandrus
Cyperus erythrorhizos red-rooted nutsedge
Cyperus esculentus yellow nutgrass
Cyperus flavescens
Cyperus fuscus brown flatsedge
Cyperus grayoides
Cyperus houghtonii Houghton's umbrella sedge
Cyperus lupulinus Great Plains cyperus
Cyperus lupulinus subsp. lupulinus Great Plains cyperus
Cyperus lupulinus subsp. macilentus slender flatsedge
Cyperus odoratus fragrant flatsedge
Cyperus schweinitzii Schweinitz's flatsedge
Cyperus squarrosus squarrose flatsedge
Cyperus strigosus straw-colour flatsedge
Cyperus Xmesochorus
Cypripedium acaule pink ladyslipper
Cypripedium arietinum ramshead ladyslipper
Cypripedium californicum California ladyslipper
Cypripedium candidum small white ladyslipper
Cypripedium fasciculatum clustered ladyslipper
Cypripedium kentuckiense Kentucky ladyslipper
Cypripedium montanum mountain ladyslipper
Cypripedium parviflorum yellow ladyslipper
Cypripedium parviflorum var. makasin northern yellow ladyslipper
Cypripedium parviflorum var. parviflorum small yellow ladyslipper
Cypripedium parviflorum var. pubescens yellow ladyslipper
Cypripedium passerinum sparrow's-egg ladyslipper
Cypripedium reginae showy ladyslipper
Cypripedium Xandrewsii
Cyrilla racemiflora swamp cyrilla
Cystopteris bulbifera bulblet bladder fern
Cystopteris fragilis fragile fern
Cystopteris laurentiana Laurentian bladder fern
Cystopteris montana mountain bladder fern
Cystopteris protrusa lowland bladder fern
Cystopteris tenuis MacKay's brittle fern
Cytisus decumbens prostrate broom
Cytisus scoparius common broom