Clematis texensis 'Duchess of Albany' Clematis virginiana
Clethra acuminata Clethra alnifolia
Clethra alnifolia 'Ann Bidwell' Clethra alnifolia 'Caleb (Vanilla Spice®)'
Clethra alnifolia 'Compacta' Clethra alnifolia 'Crystalina (Sugartina® Crystalina)'
Clethra alnifolia 'Fern Valley Pink' Clethra alnifolia 'Hummingbird'
Clethra alnifolia 'Rosea' Clethra alnifolia 'Ruby Spice'
Clethra alnifolia 'September Beauty' Cliftonia monophylla
Clintonia andrewsiana Clintonia umbellulata
Clusia major Cobaea scandens
Coccoloba diversifolia Coccoloba microstachya
Coccoloba rugosa Coccoloba uvifera
Coccothrinax alta Coccothrinax argentata
Coccothrinax crinita Coccothrinax miraguama
Colubrina arborescens Columnea schiedeana
Comptonia peregrina Condalia globosa
Conocarpus erectus Conocarpus erectus var. sericeus
Conoclinium coelestinum Copernicia hospita
Copernicia macroglossa Cordia boissieri
Cordia parvifolia Coreopsis auriculata
Coreopsis auriculata 'Nana' Coreopsis auriculata 'Zamphir'
Coreopsis gigantea Coreopsis grandiflora 'Early Sunrise'
Coreopsis grandiflora 'Sunray' Coreopsis grandiflora 'Walcoreop(Flying Saucers ™)'
Coreopsis integrifolia Coreopsis lanceolata
Coreopsis lanceolata 'Baby Sun' Coreopsis lanceolata 'Goldfink'
Coreopsis lanceolata 'Sterntaler' Coreopsis rosea
Coreopsis rosea 'Alba' Coreopsis rosea 'American Dream'
Coreopsis rosea 'Sweet Dreams' Coreopsis tinctoria
Coreopsis tinctoria 'Mardi Gras' Coreopsis verticillata 'Golden Gain'
Coreopsis verticillata 'Golden Showers' Coreopsis verticillata 'Grandiflora'
Coreopsis verticillata 'Moonbeam' Coreopsis verticillata 'Zagreb'
Cornus alternifolia Cornus alternifolia 'Argentea'
Cornus amomum 'Cinderella' Cornus asperifolia var. drummondii
Cornus canadensis Cornus florida
Cornus florida 'Barton' Cornus florida 'Cherokee Chief™'
Cornus florida 'Cherokee Daybreak' Cornus florida 'Cherokee Princess'
Cornus florida 'Cherokee Sunset™' Cornus florida 'Cloud 9'
Cornus florida 'First Lady' Cornus florida 'Newport Dam'
Cornus florida 'Pendula' Cornus florida 'Plena'
Cornus florida 'Poinsett' Cornus florida 'Pygmaea'
Cornus florida 'Rainbow' Cornus florida 'Red Beauty®'
Cornus florida 'Rosea' Cornus florida 'Spring Grove®'
Cornus florida 'Sweetwater Red' Cornus florida 'Weaver's White'
Cornus florida 'Welchii' Cornus florida 'Wonderberry'
Cornus florida f. rubra Cornus florida f. rubra 'Cherokee Brave'
Cornus kousa X C. florida 'Eddies White Wonder™' Cornus kousa X C. florida 'Rutban(Aurora®)'
Cornus kousa X C. florida 'Rutcan(Constellation®)' Cornus kousa X C. florida 'Rutdan(Celestial®)'
Cornus kousa X C. florida 'Rutfan(Stardust®)' Cornus kousa X C. florida 'Rutgan(Stellar Pink®)'
Cornus kousa X C. florida 'Rutlan(Ruth Ellen®)' Cornus nuttallii
Cornus occidentalis Cornus racemosa
Cornus racemosa 'Salvin's Dwarf' Cornus stolonifera
Cornus stolonifera 'Allman's Compact' Cornus stolonifera 'Baileyi'
Cornus stolonifera 'Cardinal' Cornus stolonifera 'Kelseyi'
Cornus stolonifera 'Kelseys Gold' Cornus stolonifera 'Silver and Gold'
Cornus stolonifera 'White Gold' Cornus stricta