'Compacta' American Arborvitae 'Compacta' Carolina Laurel Cherry
'Compacta' Corkbark Fir 'Compacta' Gallberry Holly
'Compacta' Summer Sweet 'Compacta' White Fir
'Compactum' American Cranberrybush Viburnum 'Compactum' Oregon Holly Grape
Compass Barrel Cactus 'Compton's Form' Knotweed: virginianum
Condalia, Bitter Coneflower, Cabbage Leaf
Coneflower, Clasping Coneflower, Cutleaf (spp.)
Coneflower, Cutleaf 'Goldquelle' Coneflower, Drooping
Coneflower, Giant Coneflower, Great
Coneflower, Green Headed (spp.) Coneflower, Green Headed 'Goldquelle'
Coneflower, Grey-Head Coneflower, Hedge (spp.)
Coneflower, Hedge 'Bright Star' Coneflower, Hedge 'Kim's Knee High'
Coneflower, Hedge 'Kim's Mophead' Coneflower, Hedge 'Magnus'
Coneflower, Hedge 'Ruby Star' Coneflower, Hedge 'White King'
Coneflower, Hedge 'White Swan' Coneflower, Missouri
Coneflower, Orange 'Goldsturm' Coneflower, Ozark
Coneflower, Pale Coneflower, Praire
Coneflower, Purple (spp.) Coneflower, Purple 'Bright Star'
Coneflower, Purple 'Kim's Knee High' Coneflower, Purple 'Kim's Mophead'
Coneflower, Purple 'Magnus' Coneflower, Purple 'Ruby Star'
Coneflower, Purple 'White King' Coneflower, Purple 'White Swan'
Coneflower, Shining 'Herbstsonne' Coneflower, Shiny 'Herbstsonne'
Coneflower, Sweet 'Henry Eilers' Coneflower, Tall
Coneflower, Tennessee (spp.) Coneflower, Three-lobed
Coneflower, Yellow Confused Sedum
'Conica' Atlantic White Cedar 'Contorta' Eastern White Pine
Coontie Copal
Copal: microphylla Copper Canyon Daisy
Copper Plant, Caribbean Copperleaf: ficoidea 'Brilliant'
Coral Bean Coral Bean, Eastern
Coral Bells (spp.) Coral Bells 'Ruby Veil'
Coral Bells: Heuchera 'Santa Ana Cardinal' Coral Bells: micrantha 'Palace Purple'
Coral Bells: micrantha 'Pewter Moon' Coral Bells: micrantha 'Raspberry Regal'
Coral Bells: micrantha 'Ruffles' Coral Bells: pulchella
Coral Bells: sanguinea (spp.) Coral Bells: sanguinea 'June Bride'
Coral Bells: sanguinea 'Silver Veil' Coral Bells: sanguinea 'Sioux Falls'
Coral Bells: sanguinea 'Splendens' Coral Bells: sanguinea 'Stormy Seas'
Coral Bells: sanguinea 'Windfield Pink' Coral Honeysuckle: sempervirens (spp.)
Coral Plant: equisetiformis Coral Sumac
Coral Tree, Naked Coral Tree: flabelliformis
Coral Vine Coral, Bean SW
Coralberry: microphyllus 'Corbett' Common Columbine
Cord Grass Cordia, Little Leaf