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Scientific Name Common Name(s) Plant Category Image
Clematis virginiana Italian clematis, Virgin's bower Native Plants, Poisonous Plants, Vines
Clematis viticella Italian clematis Poisonous Plants, Vines
Clematis x jackmanii Jackman clematis Poisonous Plants, Vines
Cleome hassleriana Cleome, Spider flower Annuals
Clerodendron trichotomum Harlequin glorybower Shrubs
Clerodendrum trichotomum 'Betty Stiles' 'Betty Stiles' Harlequin Glorybower Shrubs, Trees
Clerondendron ugandens Blue butterfly bush Annuals
Clethra acuminata Cinnamonbark clethra, Mountain pepperbush Native Plants, Shrubs, Trees
Clethra alnifolia Clethra, Summersweet, Sweet pepperbush Native Plants, Shrubs
Clethra alnifolia 'Crystalina' PP21,561 Summersweet, Summersweet clethra, 'Crystalina' Summersweet Clethra Native Plants, Shrubs
Clethra barbinervis Japanese clethra, Tree clethra Shrubs
Clethra fargesii Shrubs
Cliftonia monophylla Buckwheat tree, Titi Native Plants, Shrubs, Trees
Clintonia borealis Bluebead lily, Clinton's lily, Clintonia, Corn-lily, bluebead-lily Poisonous Plants, Wildflowers
Clintonia umbellulata Clinton's lily, Speckled wood lily, White clintonia Wildflowers
Clitoria mariana Butterfly pea Perennials, Vines, Wildflowers
Clitoria ternatea Blue pea, Butterfly pea Vines
Clivia Bush lily, Flame lily, Kaffir lily Summer Bulbs
Clivia miniata Clivia, Flame Lily, Kaffir Lily, September Lily Perennial Bulbs, Poisonous Plants
Cnidoscolus stimulosus Spurge nettle Poisonous Plants
Cobaena scandens Cathedral bells, Coral bells, Cup-and-saucer vine, Monastery bells Vines
Cocculus carolina Carolina moonseed, Coral-beads Native Plants, Vines
Codiaeum variegatum Croton, Mammy Croton Poisonous Plants
Coffea arabica Arabian coffee, Coffee plant Edible Plants, Shrubs, Trees
Coix lacryma-jobi Job's tears Ornamental Grass
Colchicum Autumn crocus, Meadow saffron, Mysteria, Wonder bulb Poisonous Plants, Summer Bulbs
Colchicum autumnale Fall Crocuses, Mysteria, Wonder Bulb Perennial Bulbs, Poisonous Plants
Colchicum spp. Autumn crocus, meadow saffron, naked ladies Poisonous Plants
Coleus pumilus Trailing coleus Annuals
Coleus x hybridus Coleus Annuals
Colocasia esculenta Elephant ears, Green taro Poisonous Plants, Water Garden
Colocasia spp. Dasheen, Elephant's-ear, Taro Annuals, Poisonous Plants
Colutea arborescens Common bladder senna Shrubs
Commelina communis Common dayflower, Dayflower Perennials, Wildflowers
Comptonia peregrina Sweet fern Shrubs
Conium maculatum Poison hemlock, poison fool's parsley Poisonous Plants
Conoclinium coelestinum Blue boneset, Blue mist flower, Hardy ageratum Native Plants, Perennials, Wildflowers
Conopholis americana Cancer corn, Squaw root Wildflowers
Conradina verticillata Cumberland rosemary Native Plants, Shrubs
Convallaria majalis Lily of the Valley, Lily-of-the-valley Perennial Bulbs, Poisonous Plants, Spring Bulbs
Convallarina montana Lily of the valley Wildflowers
Convolulus tricolor Dwarf morning glory Annuals
Convolvulus arvensis Field bindweed, Small bindweed Wildflowers
Conyza canadensis (L.) Horse weed, Horseweed, Marestail Annuals, Herbs
Corallorrhiza maculata Spotted coralroot Wildflowers
Cordyline terminalis Ti plant Shrubs
Coreopsis auriculate Ear-leaved tickseed, Lobed tickseed, Mouse-eared coreopsis Herbs, Native Plants, Perennials, Wildflowers
Coreopsis falcata Pool coreopsis , Sickle tickseed Herbs, Native Plants, Perennials, Wildflowers
Coreopsis gladiata Coastal Plain Tickseed, Coastal Tickseed Herbs, Native Plants, Perennials, Wildflowers
Coreopsis lanceolata Lanceleaf coreopsis, sand coreopsis, tickseed Herbs, Native Plants, Perennials, Wildflowers