Abelia

Abelia × 'Edward Goucher' (Edward Goucher Abelia)

Abeliophyllum

Abeliophyllum distichum (White Forsythia )

Adansonia

Adansonia digitata (Baobab)

Adenium

Adenium obesum (Desert Rose )

Adenocarpus

Adenocarpus decorticans (Silver Broom )

Aesculus

Aesculus californica (California Buckeye )
Aesculus × carnea 'O'Neill Red' (O'Neill Red Horsechestnut )
Aesculus chinensis (Chinese 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 )

Akebia

Akebia quinata (Five-leaf Akebia )

Albizia

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

Alnus

Alnus alnobetula subsp. sinuata (Sitka Alder )
Alnus cordata (Italian Alder)
Alnus glutinosa (Common Alder )
Alnus incana subsp. tenuifolia (Thinleaf Alder )
Alnus japonica (Japanese Alder)
Alnus rhombifolia (White Alder)
Alnus rubra (Red Alder )

Amelanchier

Amelanchier alnifolia (Western Serviceberry )
Amelanchier alnifolia 'Regent' (Regent Serviceberry )
Amelanchier canadensis (Shadblow )
Amelanchier × grandiflora (Apple Serviceberry)
Amelanchier × grandiflora Autumn Brilliance® (Autumn Brilliance Serviceberry)
Amelanchier × grandiflora 'Forest Prince' (Forest Prince Serviceberry)
Amelanchier laevis (Allegheny Serviceberry )

Amorpha

Amorpha nana (Dwarf Wild Indigo )

Aralia

Aralia elata (Angelica Tree )

Argyrocytisus

Argyrocytisus battandieri (Pineapple Broom )

Aronia

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

Baccharis

Baccharis pilularis (Coyote Bush )

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)

Buddleia

Buddleia × 'Blue Chip' (Blue Chip Buddleia)
Buddleia alternifolia (Alternate-leaf Butterfly Bush )
Buddleia davidii (Butterfly Bush)
Buddleia globosa (Orange Butterfly Bush )
Buddleia × weyeriana 'Honeycomb' (Honeycomb Butterfly Bush)

Callicarpa

Callicarpa americana (American Beautyberry )
Callicarpa bodinieri 'Profusion' (Profusion Beautyberry)
Callicarpa dichotoma (Purple Beautyberry)
Callicarpa dichotoma 'Albifructus' (White Fruited Beautyberry)
Callicarpa japonica (Japanese Beautyberry)

Calycanthus

Calycanthus × 'Aphrodite' (Aphrodite Sweetshrub)
Calycanthus floridus (Carolina Allspice )
Calycanthus occidentalis (Western Spicebush )
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 )

Ceanothus

Ceanothus × delilianus 'Henri Desfosse' (Henri Desfosse Ceanothus)
Ceanothus integerrimus (Deer Brush)
Ceanothus sanguineus (Redstem Ceanothus )

Ceiba

Ceiba speciosa (Floss Silk Tree)

Cephalanthus

Cephalanthus occidentalis (Buttonbush )

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 canadensis var. texensis 'Oklahoma' (Oklahoma 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 )

Chimonanthus

Chimonanthus praecox (Fragrant Wintersweet)

Chionanthus

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

Chitalpa

Chitalpa tashkentensis 'Pink Dawn' (Pink Dawn Chitalpa)

Chrysothamnus

Chrysothamnus viscidiflorus (Green Rabbitbrush )

Cladrastis

Cladrastis kentukea (American Yellowwood)

Clematis

Clematis (hybrid) (Hybrid Clematis)
Clematis montana var. rubens (Pink Anemone Clematis)
Clematis tangutica (Golden Clematis)
Clematis terniflora (Sweet Autumn Clematis, )
Clematis viticella (Italian Clematis)