Corn Plant (spp.) Corn Plant 'Limelight'
Corn Plant 'Massangeana' Cornelian Cherry Dogwood (spp.)
Cornelian Cherry Dogwood 'Elegantissima' Cornelian Cherry Dogwood 'Golden Glory'
Cornelian Cherry Dogwood 'Spring Glow' Cornelian Cherry Dogwood Variegated
Cornish Heath 'St. Keverne' 'Cornwall Blue' Butterflybush
Coroba 'Coronation Gold' Rose
'Coronation Triumph' Shrubby Cinquefoil Correa
Correa, Common Correa, Mountain
Correa, Velvet Correa, Yellow
Corriosa Corsica Pine (spp.)
Corsica Pine 'Globosa' Corylopsis
Corymbia Corynocarpus
Corytoplectus Corytoplectus: cutucuensis
Cotoneaster 'Erlinda' Cotoneaster (spp.)
Cotoneaster, Bearberry (spp.) Cotoneaster, Bearberry 'Coral Beauty'
Cotoneaster, Bearberry 'Mooncreeper' Cotoneaster, Bearberry 'Skogholm'
Cotoneaster, Cranberry Cotoneaster, Creeping
Cotoneaster, Hedge Cotoneaster, Parney
Cotoneaster, Rockspray (spp.) Cotoneaster, Willowleaf (spp.)
Cotoneaster, Willowleaf 'Repens' Cotoneaster, Willowleaf 'Scarlet Leader'
Cotoneaster: affinis Cotoneaster: congestus
Cotoneaster: dammeri radicans, Bearberry Cotoneaster: forrestii
Cotoneaster: hybrid 'Hessei' Cotoneaster: hybrid 'Tom Thumb'
Cotoneaster: linearifolius Cotoneaster: multiflorus
Cotoneaster: sabrinus Cotoneaster: salicifolius floccosus, Willowleaf
'Cotton Candy' Azalea Cottontree, Silk
Cottonwood Cottonwood, Eastern
Cottonwood, Fremont Cottonwood, Lanceleaf
Cottonwood, Plains Cottonwood, Western
Cottonwood: deltoides, Eastern Cottonwood: monticola
Cottonwood: wilsonii Coulter Pine
'Council Fire' Possum Haw Holly Council Tree
'County Wicklow' Scotch Heather 'Courage' Rose
Cow Itch Tree Cow Vine (spp.)
Cow Vine 'Crimson Trumpet' Cow Vine 'Flava'
Cowberry Cow's Tail Pine (spp.)
Cow's Tail Pine 'Fastigiata' Cow's Tail Pine 'Korean Gold'
Cow's Tail Pine 'Prostrata' Coyote Brush: pilularis consanguinea
Coyote Bush Coyote Bush 'Starn'
Coyote Bush: pilularis consanguinea Coyote Melon