Click on a common name for a photo of the plant, or click on a letter for names beginning with that letter.
| Cabbage, Skunk |
Symplocarpus foetidus |
| Cactus, Eastern Prickly-pear |
Opuntia humifusa var. humifusa |
| Camphorweed |
Heterotheca subaxillaris |
| Camphorweed, Stinking |
Pluchea foetida var. foetida |
| Campion, Bladder |
Silene vulgaris |
| Campion, Rose |
Silene coronaria |
| Campion, White |
Silene latifolia |
| Cancer-root, American |
Conopholis americana |
| Cardinal-flower |
Lobelia cardinalis |
| Carpetgrass, Small |
Arthraxon hispidus |
| Carpetweed, Green |
Mollugo verticillata |
| Carrion-flower, Downy |
Smilax pulverulenta |
| Carrion-flower, Smooth |
Smilax herbacea |
| Carrot, Wild |
Daucus carota |
| Cat's-ear, Spotted |
Hypochaeris radicata |
| Catalpa, Southern |
Catalpa bignonioides |
| Catchfly, Starry |
Silene stellata |
| Catnip |
Nepeta cataria |
| Cattail, Broadleaf |
Typha latifolia |
| Cattail, Narrowleaf |
Typha angustifolia |
| Cedar, Atlantic White |
Chamaecyparis thyoides |
| Celandine, Greater |
Chelidonium majus |
| Celandine, Lesser |
Ficaria verna |
| Centaury-plant, Branching |
Centaurium pulchellum |
| Chainfern, Netted |
Woodwardia areolata |
| Chainfern, Virginia |
Woodwardia virginica |
| Chastetree, Roundleaf |
Vitex rotundifolia |
| Cheeses |
Malva neglecta |
| Cheeseweed, Dwarf |
Malva neglecta |
| Cherry, Sweet |
Prunus avium |
| Cherry, Wild Black |
Prunus serotina var. serotina |
| Chervil, Spreading |
Chaerophyllum procumbens var. procumbens |
| Chickweed, Common |
Stellaria media |
| Chickweed, Five-stamen |
Cerastium semidecandrum |
| Chickweed, Jagged |
Holosteum umbellatum |
| Chickweed, Mouse-ear |
Cerastium fontanum |
| Chickweed, Serpentine |
Cerastium velutinum var. velutinum |
| Chicory |
Cichorium intybus |
| Chokeberry, Black |
Aronia melanocarpa |
| Chokeberry, Red |
Aronia arbutifolia |
| Cinquefoil, Canada |
Potentilla canadensis |
| Cinquefoil, Indian |
Potentilla indica |
| Cinquefoil, Simple |
Potentilla simplex |
| Cinquefoil, Sulphur |
Potentilla recta |
| Clearweed, Canada |
Pilea pumila |
| Cliff-brake, Purple-stem |
Pellaea atropurpurea |
| Clover, Alsike |
Trifolium hybridum |
| Clover, Low Hop |
Trifolium campestre |
| Clover, Pin |
Erodium cicutarium |
| Clover, Rabbit-foot |
Trifolium arvense |
| Clover, Red |
Trifolium pratense |
| Clover, White |
Trifolium repens |
| Club, Golden |
Orontium aquaticum |
| Club, Hercules |
Aralia spinosa |
| Clubmoss, Shining |
Huperzia lucidula |
| Clubmoss, Tree |
Dendrolycopodium obscurum |
| Cocklebur, Rough |
Xanthium strumarium |
| Cohosh, Black |
Actaea racemosa |
| Cohosh, Blue |
Caulophyllum thalictroides |
| Colts-foot |
Tussilago farfara |
| Columbine, Wild |
Aquilegia canadensis |
| Comfrey, Wild |
Cynoglossum virginianum var. virginianum |
| Coneflower, Columnar Prairie |
Ratibida columnifera |
| Coneflower, Green-head |
Rudbeckia laciniata var. laciniata |
| Copperleaf, Rhomboid |
Acalypha rhomboidea |
| Coral-berry |
Symphoricarpos orbiculatus |
| Coralroot, Autumn |
Corallorhiza odontorhiza |
| Cordgrass, Salt Marsh |
Spartina alterniflora |
| Coreopsis, Lance-leaf |
Coreopsis lanceolata |
| Coreopsis, Rose |
Coreopsis rosea |
| Cornsalad, European |
Valerianella locusta |
| Corydalis, Yellow |
Corydalis flavula |
| Cosmos, Garden |
Cosmos bipinnatus |
| Cottonweed, Florida |
Froelichia floridana |
| Cottonweed, Slender |
Froelichia gracilis |
| Cow-parsnip |
Heracleum maximum |
| Cranberry, Large |
Vaccinium macrocarpon |
| Crane's-bill, Carolina |
Geranium carolinianum |
| Crane's-bill, Dovesfoot |
Geranium molle |
| Crane's-bill, Long-stalk |
Geranium columbinum |
| Crane's-bill, Robert's |
Geranium robertianum |
| Crane's-bill, Small-flower |
Geranium pusillum |
| Creeper, Virginia |
Parthenocissus quinquefolia |
| Creeper, Winter |
Euonymus fortunei |
| Crocus, Woodland |
Crocus tomasinianus |
| Cross, Decumbent St. Andrew's |
Hypericum stragulum |
| Cucumber-root, Indian |
Medeola virginiana |
| Cudweed, Fragrant |
Pseudognaphalium obtusifolium |
| Culver's-root |
Veronicastrum virginicum |
| Cup-plant |
Silphium perfoliatum |