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Scientific Name Common Name(s) Plant Category Image
Chamaesyce maculata L. Spotted spurge Herbs
Chamaesyce nutans Nodding spurge Annuals
Chamaesyce prostrata Ground spurge Herbs
Chamaesyce serpens Creeping spurge Annuals
Chasmanthe Pennants Summer Bulbs
Chasmanthium latifolium Northern sea oats, River oats, Wild oats Native Plants, Ornamental Grass
Cheiranthus cheiri Wallflower Annuals
Chelidonium majus Celandine, rock-poppy Poisonous Plants
Chelone glabra Chelone, White turtlehead Wildflowers
Chelone lyonii Lyon's turtlehead, Pink turtlehead, Shellflower, Turtlehead Perennials, Wildflowers
Chenopodium album Bacon weed, Fat hen, Goosefoot, Lambsquarters, Pigweed Annuals, Edible Plants
Chenopodium ambrosioides Mexican tea, wormseed Poisonous Plants
Chimaphila maculata Spotted wintergreen, Striped wintergreen Wildflowers
Chimonanthus praecox Fragrant wintersweet Shrubs
Chionanthus retusus Chinese fringetree Trees
Chionanthus virginicus Fringe tree, Old man's beard Native Plants, Shrubs, Trees
Chionodoxa luciliae, C. gigantea Glory of the Snow Perennial Bulbs, Spring Bulbs
Chlidanthus Delicate lily, Perfumed fairy lily Summer Bulbs
Chlorophyllum molybdites Green Gill, Green-Spored Parasol Poisonous Plants
Chlorophytum comosum Spiderplant Perennials
Choisya ternata Mexican orange Shrubs
Chryopsis mariana Perennials
Chrysanthemum morifolium Chrysanthemum Perennials
Chrysanthemum X morifolium (Dendranthema X grandiflorum) Garden chrysanthemum, mum Poisonous Plants
Chrysogonum virginianum Green and gold Groundcover, Herbs, Native Plants, Perennials, Wildflowers
Chrysogonum virginianum var. brevistolon Goldenstar, Green and gold Groundcover, Native Plants, Perennials
Chrysopsis mariana Maryland aster Wildflowers
Cichorium intybus Chicory Edible Plants, Wildflowers
Cicuta maculata Water hemlock, spotted cowbane, spotted water hemlock Poisonous Plants, Wildflowers
Cimicifuga americana American bugbane, Black snakeroot Wildflowers
Cirsium Cirsium, Plume thistle Annuals
Cirsium horridulum Bristle thistle, Bull thistle, Horrid thistle, Purple thistle, Spiny thistle, Yellow thistle Herbs, Native Plants, Wildflowers
Cirsium muticum Marsh thistle, Swamp thistle Wildflowers
Cirsium pumilum Fragrant thistle, Pasture thistle Wildflowers
Cirsium vulgare Bull thistle, Common thistle Wildflowers
Cissus antarctica Kangaroo vine Vines
Cissus rhombifolia Grape leaf ivy, Oak leaf ivy Vines
Cladrastis kentukea Yellowwood Native Plants
Cladrastis lutea Yellowwood Native Plants, Trees
Clarkia hybrids Farwell to-spring, Godetia, Rocky Mountain garland Annuals
Claytonia caroliniana Carolina spring beauty, Spring beauty Wildflowers
Clematis armandii Armand clematis, Evergreen clematis Poisonous Plants, Vines
Clematis crispa Curly clematis Poisonous Plants, Vines
Clematis hybrida Clematis, Hybrids Poisonous Plants, Vines
Clematis montana Anemone clematis, Indian's virgin's bower Poisonous Plants, Vines
Clematis paniculata Sweet autumn clematis Poisonous Plants, Vines
Clematis recta Clematis Poisonous Plants, Vines
Clematis spp. Clematis, Leather flower, virgin's bower Perennials, Poisonous Plants, Vines, Wildflowers
Clematis tangutica Golden clematis, Old man's beard clematis Poisonous Plants, Vines
Clematis texensis Scarlet clematis Poisonous Plants, Vines