Genus names beginning with C:
255 genera
1,286 species
161 subspecies and varieties
1,286 species
161 subspecies and varieties
Show only taxa with photos
Cabomba (1 species)
Cacaliopsis – cacaliopsis (1 species)
Cacaliopsis – silvercrown (1 species)
Cakile – searocket (2 species)
Calamagrostis (8 species)
Calamovilfa – sandreed (1 species)
Calandrinia – calandrinia (1 species)
Calbovista (1 species)
Calcipostia (1 species)
Calendula (0 species)
Calicium (12 species)
Callistosporium (1 species)
Callitriche – water-starwort (6 species)
Callitropsis – cedar (1 species)
Callitropsis – cypress (1 species)
Calluna – Scotch heather (1 species)
Calocera (3 species)
Calochortus – cats-ear (8 species)
Calochortus – mariposa lily (8 species)
Calochortus – sego lily (8 species)
Calochortus – mariposa (8 species)
Calochortus – star-tulip (8 species)
Calocybe (3 species)
Caloplaca (47 species)
Caloscypha (1 species)
Caltha – marsh-marigold (3 species)
Calvatia (12 species)
Calvitimela (1 species)
Calycanthus (0 species)
Calycularia (1 species)
Calypogeia (7 species)
Calypso – fairy-slipper (1 species)
Calypso – Venus-slipper (1 species)
Calyptella (1 species)
Calyptridium – calyptridium (2 species)
Calyptridium – pussypaws (2 species)
Calystegia – bindweed (4 species)
Calystegia – morning-glory (4 species)
Camassia – camas (3 species)
Camelina – falseflax (1 species)
Camissonia – sun cup (3 species)
Campanula (10 species)
Canadanthus – mountain aster (1 species)
Candelaria (3 species)
Candelariella (8 species)
Cannabis – cannabis (1 species)
Cannabis – hemp (1 species)
Cannabis – marijuana (1 species)
Cantharellus (4 species)
Cantharocybe (1 species)
Capsella – shepherd's-purse (1 species)
Caragana – pea-tree (1 species)
Carbonea (2 species)
Cardamine – bittercress (13 species)
Cardamine – toothwort (13 species)
Cardionema – sandmat (1 species)
Carduus – plumeless thistle (4 species)
Carduus – thistle (4 species)
Carex – sedge (140 species)
Carthamus – distaff thistle (0 species)
Carum (0 species)
Cascadia (1 species)
Cassiope – moss-heather (3 species)
Cassiope – mountain-heather (3 species)
Castanea (1 species)
Castilleja – Indian-paintbrush (19 species)
Castilleja – owl-clover (19 species)
Castilleja – paintbrush (19 species)
Catabrosa – brookgrass (0 species)
Catabrosa – water whorlwort (0 species)
Catalpa – catalpa (2 species)
Catapyrenium (3 species)
Catathelasma (2 species)
Catillaria (4 species)
Catinaria (1 species)
Caulanthus – wild cabbage (1 species)
Caulanthus – caulanthus (1 species)
Cavernularia (2 species)
Ceanothus – buckbrush (5 species)
Ceanothus – buckthorn (5 species)
Ceanothus – ceanothus (5 species)
Ceanothus – wild-lilac (5 species)
Celtis – hackberry (1 species)
Cenangium (2 species)
Cenchrus – bur-grass (1 species)
Cenchrus – hedgehog-grass (1 species)
Cenchrus – sandbur (1 species)
Centaurea – centaurea (16 species)
Centaurea – knapweed (16 species)
Centaurea – star-thistle (16 species)
Centaurea – thistle (16 species)
Centaurium – centaury (2 species)
Centranthus – valerian (1 species)
Centromadia – spikeweed (1 species)
Cephalanthera – phantom-orchid (1 species)
Cephalanthera – snow-orchid (1 species)
Cephalozia (4 species)
Cephaloziella (5 species)
Ceraceomyces (3 species)
Cerastium – cerastium (11 species)
Cerastium – chickweed (11 species)
Cerastium – mouse-ear chickweed (11 species)
Ceratobasidium (3 species)
Ceratocephala – bur buttercup (1 species)
Ceratocephala – hornseed buttercup (1 species)
Ceratocephala – curveseed butterwort (1 species)
Ceratophyllum – coontail (2 species)
Ceratophyllum – hornwort (2 species)
Cercocarpus – mountain-mahogany (1 species)
Cerioporus (1 species)
Ceriporia (6 species)
Ceriporiopsis (4 species)
Cerrena (1 species)
Cetraria (5 species)
Cetrelia (1 species)
Chaenactis – chaenactis (2 species)
Chaenactis – false-yarrow (2 species)
Chaenomeles (0 species)
Chaenorhinum – dwarf snapdragon (1 species)
Chaenotheca (19 species)
Chaenothecopsis (16 species)
Chaerophyllum – chervil (1 species)
Chaetodermella (1 species)
Chalciporus (2 species)
Chamaenerion – fireweed (2 species)
Chamonixia (1 species)
Cheilymenia (3 species)
Cheimonophyllum (1 species)
Chelidonium – greater celandine (1 species)
Chenopodiastrum – goosefoot (2 species)
Chenopodium – goosefoot (8 species)
Chenopodium – lamb's quarters (8 species)
Chenopodium – pigweed (8 species)
Cherleria – sandwort (2 species)
Chiloscyphus (2 species)
Chimaphila – pipsissewa (2 species)
Chimaphila – prince's-pine (2 species)
Chlamydopus (1 species)
Chlorociboria (2 species)
Chlorophyllum (4 species)
Choiromyces (1 species)
Chondrilla – gum-succory (1 species)
Chondrilla – skeletonweed (1 species)
Chondrostereum (1 species)
Chorispora – chorispora (1 species)
Chorispora – blue mustard (1 species)
Chorizanthe – chorizanthe (1 species)
Chorizanthe – spineflower (1 species)
Chromosera (1 species)
Chroogomphus (6 species)
Chrysolepis – chinquapin (1 species)
Chrysomphalina (3 species)
Chrysosplenium – golden-carpet (2 species)
Chrysosplenium – golden-saxifrage (2 species)
Chrysosplenium – water-carpet (2 species)
Chrysothamnus – rabbit-brush (1 species)
Chrysothrix (3 species)
Chylismia – beeblossom (1 species)
Ciboria (2 species)
Cicer (1 species)
Cichorium – chicory (1 species)
Cicuta – water-hemlock (3 species)
Cinereomyces (1 species)
Cinna – wood reed-grass (1 species)
Cinna – woodreed (1 species)
Circaea – circaea (1 species)
Circaea – enchanter's nightshade (1 species)
Circinaria (6 species)
Cirsium – thistle (10 species)
Cistella (2 species)
Citrullus (0 species)
Cladidium (1 species)
Cladonia (67 species)
Clarkia – clarkia (6 species)
Clarkia – godetia (6 species)
Claudopus (1 species)
Clavaria (7 species)
Clavariadelphus (7 species)
Claviceps (1 species)
Clavulina (5 species)
Clavulinopsis (2 species)
Claytonia – claytonia (12 species)
Claytonia – miner's lettuce (12 species)
Claytonia – springbeauty (12 species)
Cleistocybe (2 species)
Clematis – clematis (5 species)
Clematis – virgins-bower (5 species)
Clevea (1 species)
Climacocystis (1 species)
Clinopodium – clinopodium (2 species)
Clintonia – beadlily (1 species)
Clintonia – bluebead (1 species)
Clintonia – clintonia (1 species)
Cliostomum (2 species)
Clitocybe (56 species)
Clitocybula (3 species)
Clitopilus (2 species)
Coccocarpia (1 species)
Coccomyces (2 species)
Coccotrema (1 species)
Cochlearia – scurvygrass (1 species)
Cochlearia – spoonwort (1 species)
Coenogonium (2 species)
Coix (0 species)
Colacogloea (2 species)
Colchicum (1 species)
Coleanthus – moss-grass (1 species)
Collema (19 species)
Collemopsidium (2 species)
Collinsia – collinsia (4 species)
Collinsia – blue-eyed Mary (4 species)
Collomia – collomia (8 species)
Collybia (4 species)
Coltricia (2 species)
Columbiadoria – goldenweed (1 species)
Colutea – bladder-senna (1 species)
Comandra – bastard toadflax (1 species)
Comarum – marsh cinquefoil (1 species)
Comarum – marshlocks cinquefoil (1 species)
Comarum – purple cinquefoil (1 species)
Comastoma (1 species)
Commelina (0 species)
Conferticium (1 species)
Coniophora (4 species)
Conioselinum – hemlock-parsley (1 species)
Conium – poison-hemlock (1 species)
Conocephalum (1 species)
Conocybe (13 species)
Conringia – hare's-ear mustard (1 species)
Contumyces (1 species)
Convallaria (0 species)
Convolvulus – bindweed (1 species)
Conyza – conyza (2 species)
Conyza – horseweed (2 species)
Coprinellus (7 species)
Coprinopsis (6 species)
Coprinus (11 species)
Coprotus (0 species)
Coptis – goldthread (4 species)
Corallorhiza – coral-root (4 species)
Cordyceps (1 species)
Cordylanthus – birdbeak (1 species)
Coreopsis – coreopsis (4 species)
Coreopsis – tickseed (4 species)
Coriolopsis (1 species)
Corispermum – bugseed (6 species)
Corispermum – tickseed (6 species)
Cornicularia (1 species)
Cornus – dogwood (5 species)
Corrigiola – strapwort (1 species)
Cortaderia – pampas grass (2 species)
Corticium (1 species)
Cortinarius (212 species)
Corydalis – corydalis (3 species)
Corylus – filbert (2 species)
Corylus – hazelnut (2 species)
Corynephorus (1 species)
Cota – chamomile (2 species)
Cotoneaster – cotoneaster (14 species)
Cotula – cotula (1 species)
Cotylidia (2 species)
Crassula – pygmy-weed (3 species)
Crataegus – haw (13 species)
Crataegus – hawthorn (13 species)
Crataegus – thornapple (13 species)
Craterellus (2 species)
Crepidotus (18 species)
Crepis – hawksbeard (12 species)
Cresponea (1 species)
Crinipellis (1 species)
Crocidium – crocidium (1 species)
Crocidium – spring-gold (1 species)
Crocosmia – montbretia (1 species)
Crocus (0 species)
Crossocalyx (1 species)
Croton – croton (1 species)
Cruciata – bedstraw (1 species)
Crucibulum (1 species)
Crupina – crupina (1 species)
Crustoderma (2 species)
Crustomyces (1 species)
Crypsis – prickle grass (2 species)
Cryptantha – cryptantha (13 species)
Cryptantha – white forget-me-not (13 species)
Cryptococcus (1 species)
Cryptogramma – parsley-fern (3 species)
Cryptogramma – rock-brake (3 species)
Cryptoporus (1 species)
Cucurbita (0 species)
Cudonia (2 species)
Cudoniella (1 species)
Cuscuta – coral-vine (11 species)
Cuscuta – dodder (11 species)
Cuscuta – love-tangle (11 species)
Cusickiella – cusickiella (1 species)
Cyathicula (1 species)
Cyathus (4 species)
Cybebe (1 species)
Cyclachaena – marsh-elder (1 species)
Cyclamen – cyclamen (1 species)
Cyclamen – sowbread (1 species)
Cycloloma – cycloloma (0 species)
Cycloloma – pigweed (0 species)
Cylindrobasidium (3 species)
Cymbalaria (1 species)
Cymopterus – spring parsley (2 species)
Cynodon – cynodon (1 species)
Cynoglossum – hound's-tongue (1 species)
Cynosurus – dogtail (2 species)
Cynosurus – dog's-tail grass (2 species)
Cyperus – cyperus (12 species)
Cyperus – flatsedge (12 species)
Cyphelium (0 species)
Cyphellostereum (2 species)
Cypripedium – lady's-slipper (4 species)
Cystangium (3 species)
Cystocoleus (1 species)
Cystoderma (2 species)
Cystodermella (2 species)
Cystolepiota (4 species)
Cystopteris – bladder-fern (1 species)
Cytidia (2 species)
Cytisus – broom (3 species)
