Cladrastis

Cladrastis kentukea (American Yellowwood)

Clematis

Clematis (hybrid) (Hybrid Clematis)
Clematis armandii (Evergreen Clematis )
Clematis terniflora (Sweet Autumn Clematis, )
Clematis viticella (Italian Clematis)
Clematis viticella 'Huldine' (Huldine Italian Clematis )
Clematis viticella 'Polish Spirit' (Polish Spirit Italian Clematis)

Clerodendrum

Clerodendrum trichotomum (Harlequin Glorybower )
Clerodendrum trichotomum 'Stargazer' (Stargazer Harlequin Glorybower)

Coleogyne

Coleogyne ramosissima (Blackbrush)

Cornus

Cornus 'Eddies White Wonder' (Eddie's White Wonder Dogwood)
Cornus 'Porlock' (Porlock Dogwood)
Cornus Venus® (Venus Dogwood)
Cornus alba (Tatarian Dogwood )
Cornus alternifolia (Pagoda Dogwood)
Cornus amomum (Silky Dogwood)
Cornus canadensis (Bunchberry)
Cornus capitata (Evergreen Dogwood )
Cornus controversa (Giant Dogwood)
Cornus controversa 'June Snow' (June Snow Giant Dogwood)
Cornus drummondii (Rough-leaved Dogwood)
Cornus × elwinortonii Starlight® (Starlight Dogwood)
Cornus florida (Flowering Dogwood )
Cornus florida 'Golden Nugget' (Golden Nugget Dogwood)
Cornus florida 'Welchii' (Tricolor Dogwood )
Cornus kousa (Kousa Dogwood )
Cornus kousa 'Gold Star' (Gold Star Dogwood)
Cornus kousa 'Radiant Rose' (Radiant Rose Dogwood)
Cornus kousa Scarlet Fire® (Scarlet Fire Dogwood)
Cornus kousa 'Sunsplash' (Sunsplash Dogwood)
Cornus kousa 'Wolf Eyes' (Wolf Eyes Dogwood)
Cornus mas (Corneliancherry Dogwood)
Cornus officinalis (Japanese Cornelian Dogwood )
Cornus racemosa (Gray Dogwood )
Cornus × rutgersensis Celestial® (Celestial Dogwood)
Cornus sanguinea (Bloodtwig Dogwood)
Cornus sanguinea 'Midwinter Fire' (Midwinter Fire Dogwood)
Cornus sericea subsp. sericea (Redosier Dogwood)
Cornus sericea subsp. sericea 'Argenteo-marginata' (Variegated Dogwood )
Cornus sericea subsp. sericea 'Elegantissima' (Variegated Tatarian Dogwood )
Cornus sericea subsp. sericea 'Flaviramea' (Golden Twig Dogwood )
Cornus sericea subsp. sericea 'Hessei' (Siberian Dogwood )
Cornus sericea subsp. sericea Ivory Halo™ (Ivory Halo Dogwood )

Cotinus

Cotinus coggygria (Common Smoketree )
Cotinus coggygria Golden Spirit™ (Golden Spirit Smoketree)
Cotinus coggygria 'Royal Purple' (Royal Purple Smoketree)
Cotinus obovatus (American Smoketree )

Cotoneaster

Cotoneaster bullatus (Hollyberry Cotoneaster)
Cotoneaster congestus (Pyrenees Cotoneaster)
Cotoneaster dammeri (Bearberry Cotoneaster)
Cotoneaster dammeri 'Eichholz' (Eichholz Cotoneaster )
Cotoneaster dammeri 'Lowfast' (Lowfast Cotoneaster)
Cotoneaster divaricatus (Spreading Cotoneaster)
Cotoneaster franchetii (Franchet Cotoneaster)
Cotoneaster horizontalis (Rockspray Cotoneaster )
Cotoneaster intergerrimus (European Cotoneaster)
Cotoneaster lacteus (Parney Cotoneaster)
Cotoneaster lucidus (Hedge Cotoneaster)
Cotoneaster microphyllus (Littleleaf Cotoneaster)
Cotoneaster microphyllus 'Cooperi' (Cooperi Littleleaf Cotoneaster)
Cotoneaster multiflorus (Many-flowered Cotoneaster)
Cotoneaster salicifolius (Willowleaf Cotoneaster)
Cotoneaster salicifolius 'Autumn Fire' (Autumn Fire Cotoneaster)
Cotoneaster simonsii (Simons Cotoneaster)
Cotoneaster × suecicus 'Coral Beauty' (Coral Beauty Cotoneaster)

Crataegus

Crataegus germanica (Medlar)

Crinodendron

Crinodendron hookerianum (Chilean Lantern Tree)

Cydonia

Cydonia oblonga (Quince)

Cytisus

Cytisus scoparius (Scotch Broom )
Cytisus scoparius 'Moonlight' (Moonlight Scotch Broom)

Daboecia

Daboecia cantabrica (Irish Heath )

Daphne

Daphne 'Lawrence Crocker' (Lawrence Crocker Daphne)
Daphne × burkwoodii (Burkwood Daphne)
Daphne × burkwoodii 'Briggs Moonlight' (Briggs Moonlight Burkwood Daphne)
Daphne × burkwoodii 'Carol Mackie' (Carol Mackie Burkwood Daphne)
Daphne caucasica (Caucasian Daphne)
Daphne cneorum (Garland Daphne )
Daphne genkwa (Lilac Daphne)
Daphne laureola (Spurge Laurel)
Daphne mezereum (February Daphne )
Daphne odora (Fragrant Daphne )
Daphne odora 'Mae-Jima' (Mae-Jami Winter Daphne)
Daphne odora 'Marginata' (Variegated Fragrant Daphne )

Daphniphyllum

Daphniphyllum macropodum (False Daphne )

Davidia

Davidia involucrata (Dove Tree )

Delonix

Delonix regia (Royal Poinciana)

Dermatophyllum

Dermatophyllum secundiflorum (Mescal Bean )
Dermatophyllum secundiflorum 'Silver Peso' (Silver Peso Mescal Bean )

Distylium

Distylium × 'Vintage Jade' (Vintage Jade Evergreen Witch Hazel)

Drimys

Drimys winteri (Winter's Bark )

Edgeworthia

Edgeworthia chrysantha (Paper Bush )

Encelia

Encelia farinosa (Brittlebush )

Ephedra

Ephedra equisetina (Bluestem Joint Fir )
Ephedra fasciculata (Arizona Ephedra )
Ephedra viridis (Green Mormon Tea )

Erica

Erica carnea (Spring Heath )
Erica cinerea (Twisted Heath )
Erica × darleyensis (Darley Heath )

Eriogonum

Eriogonum fasciculatum (California Buckwheat )

Eucalyptus

Eucalyptus urnigera (Urn Gum)