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Scientific Name Common Name(s) Plant Category Image
Coreopsis tripteris Tall coreopsis, Tall tickseed Wildflowers
Coreopsis verticillata Threadleaf coreopsis, Whorled coreopsis Herbs, Native Plants, Perennials, Wildflowers
Coriandrum sativum Coriander (cilantro) Edible Plants, Herbs
Cornus 'NCCH1' PP26,542 Little Ruby™ Dogwood Shrubs, Trees
Cornus alba Tatarian dogwood Shrubs
Cornus alba 'Argenteo-marginata' Variegated tartarian dogwood Shrubs
Cornus alternifolia Alternate-leaved dogwood, Pagoda dogwood Native Plants, Trees
Cornus amomum Silky dogwood Native Plants, Shrubs, Trees
Cornus canadensis Bunchberry Groundcover, Native Plants, Wildflowers
Cornus controversa Giant dogwood Trees
Cornus florida Flowering dogwood Native Plants, Trees
Cornus hybrids Dogwood, Stellar hybrids Trees
Cornus kousa Kousa dogwood Trees
Cornus mas Cornelian cherry dogwood Trees
Cornus officinalis Japanese cornel dogwood Trees
Cornus sanguinea Bloodtwig dogwood Shrubs, Trees
Cornus sericea 'Flaviramea'; Cornus sericea 'Lutea' Yellow twig dogwood Shrubs
Cornus sericea (C. stolonifera) Red osier dogwood, Redtwig dogwood Shrubs
Coronilla varia Crown vetch, Purple crown vetch Wildflowers
Cortaderia selloana Pampas grass Ornamental Grass
Corydalis sempervirens Pale corydalis Wildflowers
Corylopsis pauciflora Buttercup winter hazel Shrubs
Corylopsis sinensis Chinese witch hazel Shrubs
Corylopsis spicata Spike winter hazel Shrubs
Corylopsis willmottiae Willmott winter hazel Shrubs
Corylorsis glabrescens Fragrant winterhazel Trees
Corylus americana American hazelnut Edible Plants, Native Plants, Shrubs
Corylus avellana European filbert, Harry Lauder's Walking Stick Trees
Cosmos bipinnatus Garden cosmos, Tall cosmos Annuals
Cosmos spp. Cosmos Annuals
Cosmos sulphureus Klondike cosmos, Orange cosmos, Sulphur cosmos Annuals
Cotinus coggygria Smokebush, Smoketree Shrubs, Trees
Cotinus obovatus American smoketree Shrubs, Trees
Cotoneaster apiculatus Cranberry cotoneaster Groundcover, Shrubs
Cotoneaster conspicuus Wintergreen cotoneaster Groundcover, Shrubs
Cotoneaster dammeri Bearberry cotoneaster Groundcover, Shrubs
Cotoneaster divaricatus Spreading cotoneaster Shrubs
Cotoneaster horizontalis Rockspray cotoneaster Groundcover, Shrubs
Cotoneaster lacteus Parney cotoneaster Shrubs
Cotoneaster microphyllus Littleleaf cotoneaster Shrubs
Cotoneaster salicifolius Willowleaf cotoneaster Groundcover
Crassocephalum crepidioides Redflower ragweed, Thickhead Annuals, Herbs
Crassula argentea Jade plant Groundcover
Crataegus crusgallii Cockspur hawthorn Trees
Crataegus mollis Downy hawthorn Native Plants, Perennials, Trees
Crataegus oxycantha English hawthorne Trees
Crataegus phaenopyrum Washington Hawthorn Edible Plants, Native Plants, Perennials, Trees
Crataegus pinnatifida Hawthorne Trees
Crataegus virdis 'Winter King' Washington hawthorn Trees
Crataegus x lavalleri Carriere hawthorn, Lavallei Trees