Acer

Acer platanoides (Norway Maple)
Acer saccharinum (Silver Maple)
Acer saccharinum 'Laciniatum' (Cutleaf Silver Maple)

Adenium

Adenium obesum (Desert Rose )

Adenocarpus

Adenocarpus decorticans (Silver Broom )

Aesculus

Aesculus × carnea (Red Flowering Horsechestnut)
Aesculus × carnea 'O'Neill Red' (O'Neill Red Horsechestnut )
Aesculus flava (Yellow Buckeye )
Aesculus glabra (Ohio Buckeye )
Aesculus glabra var. arguta (Texas Buckeye )
Aesculus hippocastanum (Horsechestnut)
Aesculus hippocastanum 'Baumannii' (Double Horsechestnut )
Aesculus parviflora (Bottlebrush Buckeye)
Aesculus pavia (Red Buckeye)
Aesculus pavia 'Humilis' (Dwarf Red Buckeye)
Aesculus sylvatica (Painted Buckeye )

Albizia

Albizia julibrissin (Silk Tree )
Albizia julibrissin 'Summer Chocolate' (Summer Chocolate Silk Tree)

Alnus

Alnus glutinosa (Common Alder )
Alnus japonica (Japanese Alder)

Argyrocytisus

Argyrocytisus battandieri (Pineapple Broom )

Aronia

Aronia arbutifolia (Red Chokeberry)
Aronia arbutifolia 'Brilliantissima' (Brilliant Red Chokeberry)

Bauhinia

Bauhinia variegata (Orchid Tree )

Berberis

Berberis thunbergii (Japanese Barberry)
Berberis thunbergii 'Aurea' (Golden Japanese Barberry)
Berberis thunbergii Golden Nugget™ (Golden Nugget Barberry)
Berberis thunbergii 'Kobold' (Kobold Japanese Barberry)
Berberis thunbergii Sunsation™ (Sunsation Barberry)
Berberis thunbergii var. atropurpurea 'Crimson Pigmy' (Crimson Pigmy Japanese Barberry)
Berberis thunbergii var. atropurpurea 'Golden Ring' (Golden Ring Barberry)
Berberis thunbergii var. atropurpurea 'Rose Glow' (Rose Glow Barberry)

Calycanthus

Calycanthus floridus (Carolina Allspice )
Calycanthus × raulstonii 'Hartlage Wine' (Hartlage Wine Sweetbush )

Campsis

Campsis radicans (Trumpet Vine )

Caragana

Caragana arborescens (Siberian Peashrub )
Caragana arborescens 'Lorbergii' (Lorberg Peashrub )
Caragana frutex 'Globosa' (Globe Russian Peashrub )
Caragana pygmaea (Pygmy Peashrub )

Carpinus

Carpinus japonica (Japanese Hornbeam)

Castanea

Castanea dentata (American Chestnut)
Castanea mollissima (Chinese Chestnut)
Castanea sativa (European Chestnut )

Catalpa

Catalpa bignonioides (Southern Catalpa )
Catalpa × erubescens 'Purpurea' (Purple Catalpa)
Catalpa speciosa (Northern Catalpa )

Cercidiphyllum

Cercidiphyllum japonicum (Katsura )

Cercis

Cercis canadensis (Eastern Redbud)
Cercis canadensis 'Forest Pansy' (Forest Pansy Redbud)
Cercis canadensis var. alba (White Flowered Redbud)
Cercis canadensis var. mexicana (Mexican Redbud)
Cercis chinensis (Chinese Redbud)
Cercis chinensis 'Avondale' (Avondale Chinese Redbud)
Cercis occidentalis (Western Redbud )
Cercis siliquastrum (Judus Tree )

Chaenomeles

Chaenomeles speciosa (Flowering Quince)

Chilopsis

Chilopsis linearis (Desert Willow )

Chionanthus

Chionanthus retusus (Chinese Fringetree)
Chionanthus virginicus (White Fringetree)

Cladrastis

Cladrastis kentukea (American Yellowwood)

Cornus

Cornus alba (Tatarian Dogwood )
Cornus alternifolia (Pagoda Dogwood)
Cornus amomum (Silky Dogwood)
Cornus canadensis (Bunchberry)
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 'Radiant Rose' (Radiant Rose 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 sanguinea (Bloodtwig Dogwood)
Cornus sanguinea 'Midwinter Fire' (Midwinter Fire 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 )

Corylopsis

Corylopsis (Winterhazel)
Corylopsis pauciflora (Buttercup Winterhazel)
Corylopsis spicata (Spike Winterhazel)

Corylus

Corylus americana (American Hazel )
Corylus avellana (Hazelnut )
Corylus avellana 'Contorta' (Contorted Filbert )
Corylus avellana 'Rote Zeller' (Rote Zeller Hazelnut)

Cotoneaster

Cotoneaster lucidus (Hedge Cotoneaster)
Cotoneaster multiflorus (Many-flowered Cotoneaster)
Cotoneaster simonsii (Simons Cotoneaster)

Crataegus

Crataegus 'Autumn Glory' (Autumn Glory Hawthorn)
Crataegus ambigua (Russian Hawthorn)
Crataegus crus-galli (Cockspur Hawthorn)
Crataegus laevigata (English Hawthorn )
Crataegus laevigata 'Pauls Scarlet' (Paul's Scarlet Hawthorn)