Caesalpina gilliesii
Callicarpa americana
Callicarpa bodinieri 'Profusion'
Callicarpa cathayana
Callicarpa dichotoma
Callicarpa japonica 'Leucocarpa'
Callicarpa kwantungensis
Calocedrus decurrens
Calocedrus decurrens 'Aureovariegata'
Calocedrus decurrens 'Pillar'
Calycanthus floridus
Calycanthus floridus 'Purpureus'
Calycanthus occidentalis
Camellia 'Cornish Snow'
Camellia cuspidata
Camellia fluviatilis
Camellia grijsii
Camellia hiemalis 'Kanjirô'
Camellia japonica 'Adolphe Audusson'
Camellia japonica 'Brushfield's Yellow'
Camellia japonica 'Guilio Nuccio'
Camellia japonica 'Jury's Yellow'
Camellia japonica 'Nobilissima'
Camellia japonica 'White Nun'
Camellia 'Night Rider'
Camellia oleifera
Camellia sasanqua 'Cleopatra'
Camellia sasanqua 'Exquisite'
Camellia sasanqua 'Fukuzutsumi'
Camellia sasanqua 'Kasane-ögi'
Camellia sasanqua 'Maiden's Blush'
Camellia sasanqua 'Narumi-gata'
Camellia sasanqua 'Navajo'
Camellia sasanqua 'Shinonome'
Camellia sasanqua 'Shionome'
Camellia sinensis
Camellia transnokoensis
Camellia williamsii 'Debbie' (x)
Camellia williamsii 'Donation' (x)
Camellia yuhsienensis
Campsis grandiflora
Campsis radicans 'Flava'
Campsis tagliabuana 'Indian Summer' (x)
Campsis tagliabuana 'Madame Galen' (x)
Campylotropis macrocarpa
Carpenteria californica
Carpenteria californica 'Elisabeth'
Carpenteria californica 'Ladham's Variety'
Carpinus betulus
Carpinus betulus 'Columnaris'
Carpinus betulus 'Fastigiata'
Carpinus betulus 'Frans Fontaine'
Carpinus betulus 'Pendula'
Carpinus caroliniana
Carpinus caroliniana 'Sentinel Dries'
Carpinus cordata
Carpinus coreana
Carpinus fangiana
Carpinus fargesiana
Carpinus japonica
Carpinus koreana
Carpinus omeiensis
Carpinus polyneura
Carpinus shensiensis
Carpinus turczaninowii
Carya aquatica
Carya buckleyi
Carya cordiformis
Carya illinoinensis
Carya laciniosa
Carya ovata
Carya texana
Caryopteris clandonensis 'Grand Blue'
Caryopteris clandonensis 'Heavenly Blue'
Caryopteris clandonensis 'Kew Blue'
Caryopteris clandonensis 'Worcester Gold'
Castanea henryi
Castanea mollissima
Castanea sativa 'Maraval'
Castanea sativa 'Variegata'
Castanopsis cuspidata var. sieboldii
Catalpa bignonioides
Catalpa bignonioides
Catalpa bignonioides 'Aurea'
Catalpa bignonioides 'Pulverulenta'
Catalpa fargesii f. duclouxii
Catalpa ovata
Ceanothus arboreus 'Trewithen Blue'
Ceanothus 'Autumnal Blue'
Ceanothus 'Blue Mound'
Ceanothus 'Concha'
Ceanothus delilianus 'Gloire de Versailles'
Ceanothus 'Edinburgh'
Ceanothus impressus 'Puget Blue'
Ceanothus thyrsiflorus 'Skylark'
Ceanothus thyrsiflorus var repens
Cedrela sinensis (Toona sinensis)
Cedrela sinensis 'Flamingo' (T sin. 'Flamingo)
Cedrus deodora
Cedrus deodora 'Aurea'
Cedrus libani
Cedrus libani 'Atlantica Pendula'
Cedrus libani 'Glauca'
Cedrus libani subsp. atlantica
Cedrus libani subsp. libani
Celtis australis
Celtis julianae
Celtis occidentalis
Cephalanthus occidentalis
Cephalotaxus harringtonia 'Fastigiata'
Cercidiphyllum japonicum
Cercidiphyllum japonicum 'Heronswood Globe'
Cercidiphyllum japonicum 'Pendulum'
Cercidiphyllum japonicum 'Rotfuchs'
Cercis canadensis
Cercis canadensis 'Flame'
Cercis canadensis 'Forest Pansy'
Cercis canadensis 'Hearts of Gold'
Cercis canadensis 'Lavender Twist'
Cercis canadensis 'Melon Beauty'
Cercis canadensis 'Oklahoma'
Cercis canadensis 'Royal White'
Cercis canadensis 'Texas White'
Cercis chinensis 'Avondale'
Cercis chinensis 'Don Egolf'
Cercis racemosa
Cercis siliquastrum
Cercis siliquastrum 'Alba'
Cercis siliquastrum 'Bodnant'
Chaenomeles cathayensis
Chaenomeles speciosa 'Geisha Girl'
Chaenomeles speciosa 'Moerloosei'
Chamaecyparis funebris
Chamaecyparis nootkatensis 'Green Arrow'
Chamaecyparis nootkatensis 'Jubilee'
Chamaecyparis pisifera 'Filifera Nana'
Chamaedaphne calyculata 'Nana'
Chamaerops humilis
Chimonanthus praecox
Chimonanthus praecox 'Luteus'
Chimonanthus salicifolius
Chionanthus retusus
Chionanthus virginicus
Choisya 'Aztec Pearl'
Choisya 'Goldfingers'
Choisya ternata
Choisya ternata 'Sundance'
Cistus corbariensis (x)
Cistus laurifolius
Cistus salvifolius
Cladrastis kentukea
Cladrastis kentukea 'Perkin's Pink'
Cladrastis kentukea 'Rosea'
Cladrastis sinensis
Clematis alpina
Clematis armandii 'Apple Blossom'
Clematis armandii 'Hendersonii Rubra'
Clematis armandii 'Jeffries'
Clematis armandii 'Little White Charm'
Clematis armandii 'Snowdrift'
Clematis 'Gillian Blades'
Clematis 'Guernsey Cream'
Clematis 'Madame Le Coultre'
Clematis montana 'Elizabeth'
Clematis montana 'Grandiflora'
Clematis 'Mrs Cholmondeley'
Clematis 'Niobe'
Clematis 'Paul Farges'
Clematis tangutica
Clematis 'The President'
Clematis viticella
Clematis 'Wada's Primrose'
Clerodendrum bungei
Clerodendrum bungei 'Pink Diamond'
Clerodendrum trichotomum
Clerodendrum trichotomum var. fargesii
Clethra acuminata
Clethra alnifolia
Clethra alnifolia 'Hummingbird'
Clethra alnifolia 'Pink Spire'
Clethra alnifolia 'Ruby Spice'
Clethra barbinervis
Clethra delavayi
Clethra monostachya
Clethra tomentosa 'Cottondale'
Colutea arborescens
Colutea bushii
Colutea media 'Copper Beauty' (x)
Colutea orientalis
Comptonia peregrina
Coriaria japonica
Coriaria myrtifolia
Coriaria terminalis var. xanthocarpa
Cornus alba
Cornus alba 'Aurea'
Cornus alba 'Elegantissima'
Cornus alba 'Gouchaultii'
Cornus alba 'Kesselringii'
Cornus alba 'Sibirica'
Cornus alba 'Sibirica Variegata'
Cornus alba 'Van Eck'
Cornus alternifolia
Cornus alternifolia 'Argentea'
Cornus amomum
Cornus angustata
Cornus 'Ascona'
Cornus canadensis
Cornus capitata
Cornus 'Constellation' (C. 'Rutcan')
Cornus controversa
Cornus controversa 'Pagoda'
Cornus controversa 'Variegata'
Cornus 'Eddie's White Wonder'
Cornus florida
Cornus florida 'Alba Plena'
Cornus florida 'Cherokee Brave'
Cornus florida 'Cherokee Chief'
Cornus florida 'Cherokee Princess'
Cornus florida 'Cloud Nine'
Cornus florida 'Daybreak'
Cornus florida f. rubra
Cornus florida 'Pendula'
Cornus florida 'Pluribracteata'
Cornus florida 'Purple Glory'
Cornus florida 'Rainbow'
Cornus florida 'Red Giant'
Cornus florida 'Royal Red'
Cornus florida 'Spring Song'
Cornus florida 'Spring Time'
Cornus florida 'Sunset'
Cornus florida 'Sweetwater'
Cornus florida 'Welchii '
Cornus florida 'White Cloud'
Cornus hongkongensis
Cornus kousa
Cornus kousa 'Annelies'
Cornus kousa 'Beni Fuji'
Cornus kousa 'Blue Shadow'
Cornus kousa 'Bodnant'
Cornus kousa 'Bultinck's Giant Flower'
Cornus kousa 'Bultinck's Weeping'
Cornus kousa 'China Girl'
Cornus kousa 'Claudia'
Cornus kousa 'cv'
Cornus kousa 'Erik De Waele'
Cornus kousa 'Eurostar'
Cornus kousa 'Grossblumig Spät'
Cornus kousa 'Kreuzdame'
Cornus kousa 'Laura' ®
Cornus kousa 'Madame Butterfly'
Cornus kousa 'Milky Way'
Cornus kousa 'Moonbeam'
Cornus kousa 'Mount Fuji'
Cornus kousa 'National'
Cornus kousa 'Nicole'
Cornus kousa 'Radiant Rose'
Cornus kousa 'Rasen'
Cornus kousa 'Robert's Select'
Cornus kousa 'Samaritin'
Cornus kousa 'Satomi'
Cornus kousa 'Schmetterling'
Cornus kousa 'Snow Flory'
Cornus kousa 'Snowboy'
Cornus kousa 'Summer Games'
Cornus kousa 'Summer Majesty'
Cornus kousa 'Summer Stars'
Cornus kousa 'Teutonia'
Cornus kousa var. chinensis
Cornus kousa 'Weaver's Weeping'
Cornus kousa 'White Giant'
Cornus kousa 'Wieting's Select'
Cornus kousa 'Wolf Eyes'
Cornus mas
Cornus mas 'Aurea'
Cornus mas 'Aurea Elegantissima'
Cornus mas 'Fructu-luteo'
Cornus mas 'Golden Glory'
Cornus mas 'Jolico'
Cornus mas 'Kasanlak'
Cornus mas 'Tricolor'
Cornus mas 'Variegata'
Cornus 'Norman Hadden'
Cornus nuttallii
Cornus nuttallii 'Colrigo Giant'
Cornus nuttallii 'Gold Spot'
Cornus nuttallii 'Monarch'
Cornus nuttallii 'North Star'
Cornus nuttallii 'Ormonde'
Cornus nuttallii 'Pink Blush'
Cornus nuttallii 'Portlemouth'
Cornus officinalis
Cornus officinalis 'Kintori'
Cornus 'Pink Blush'
Cornus 'Porlock'
Cornus rutgersiensis 'Aurora' (C. 'Rutban')
Cornus rutgersiensis 'Constellation' (C. 'Rutcan')
Cornus rutgersiensis 'Galaxy' (C. 'Rutdan')
Cornus rutgersiensis 'Stellar Pink' (C. 'Rutgan')
Cornus 'Ruth Ellen' (C. 'Rutlan')
Cornus sanguinea 'Midwinter Fire'
Cornus sanguinea 'Winter Beauty'
Cornus 'Stardust'
Cornus 'Starlight' ®
Cornus stolonifera 'Flaviramea'
Cornus stolonifera 'Kelsey's Dwarf'
Cornus 'Venus' ®
Corylopsis glabrescens 'Chollipo'
Corylopsis glabrescens var. gotoana
Corylopsis glandulosa var. hypoglauca
Corylopsis pauciflora
Corylopsis sinensis
Corylopsis sinensis var. calvescens
Corylopsis spicata
Corylus avellana
Corylus colurna
Corylus colurna 'Te-Terra Red'
Corylus maxima 'Purpurea'
Cotinus coggygria
Cotinus coggygria 'Flame'
Cotinus coggygria 'Golden Spirit'
Cotinus coggygria 'Kanari'
Cotinus coggygria 'Pink Champagne'
Cotinus coggygria 'Royal Purple'
Cotinus coggygria 'Young Lady'
Cotinus 'Grace'
Cotinus obovatus
Cotinus 'Velvet Cloak'
Cotoneaster franchetii
Crataegus calpodendron
Crataegus chlorosarca
Crataegus cordata
Crataegus fisca
Crataegus flabellata
Crataegus grignonensis (x)
Crataegus jonesiae
Crataegus laevigata 'Crimson Cloud'
Crataegus laevigata 'Paul's Scarlet'
Crataegus lavalleei (x)
Crataegus monogyna
Crataegus orientalis
Crataegus persimilis
Crataegus persimilis 'Splendens'
Crataegus phaenopyrum
Crataegus pinnatifida
Crataegus pinnatifida var. major
Crataegus punctata 'Aurea'
Crataegus punctata 'Ohio Pioneer'
Crataegus schraderiana
Crataegus submollis
Crataegus succulenta var. macracantha
Crataegus viridis 'Winter King'
Crataemespilus grandiflora
Crinodendron hookerianum
Crinodendron patagua
Cryptomeria japonica
Cryptomeria japonica 'Elegans'
Cryptomeria japonica 'Elegans Viridis'
Cryptomeria japonica 'Globosa Nana'
Cryptomeria japonica 'Koshyi'
Cryptomeria japonica 'Rasen'
Cryptomeria japonica 'Rasen-Sugi'
Cryptomeria japonica 'Sekkan-Sugi'
Cunninghamia lanceolata
Cupressocyparis leylandii
Cupressus arizonica
Cupressus funebris
Cupressus torulosa 'Cashmeriana'
Cydonia oblonga
Cydonia oblonga 'Champion'
Cydonia oblonga 'Rea's Mammoth'
Cydonia oblonga 'Vranja'
Cyrilla racemiflora
Cytisus battandieri
Cytisus corbariensis
Cytisus laurifolius