Noms scientifiques : C
- Cacalia suaveolens
 - Caccinia macranthera
 - Cadia purpurea
 - Caesalpinia decapetala
 - Caesalpinia japonica
 - Caesalpinia pulcherrima
 - Caesalpinia spinosa
 - Caiophora lateritia
 - Cakile maritima
 - Caladium bicolor
 - Calamagrostis arundinacea var. brachytricha
 - Calamagrostis epigejos
 - Calamagrostis x acutiflora
 - Calamagrostis x acutiflora 'Karl Foerster'
 - Calamagrostis x acutiflora 'Overdam'
 - Calamagrostis x acutiflora 'Waldenbuch'
 - Calamintha alpina
 - Calamintha cretica
 - Calamintha nepeta
 - Calamintha nepeta 'Blue Cloud'
 - Calamintha nepeta 'Triumphator'
 - Calamintha species 'Hadrian'
 - Calamintha sylvatica
 - Calandrinia umbellata
 - Calanthe Grouville
 - Calanthe ceciliae
 - Calanthe veratrifolia
 - Calathea crocata
 - Calathea ecuadoriana
 - Calathea makoyana
 - Calathea warscewiczii
 - Calceolaria fiebrigiana
 - Calceolaria integrifolia
 - Calceolaria purpurea
 - Calceolaria salicifolia
 - Calceolaria tomentosa
 - Calceolaria triparitita
 - Calendula officinalis
 - Calendula officinalis 'Greenheart Orange'
 - Calendula officinalis 'Radio'
 - Calibrachoa Aloha Blue Sky
 - Calibrachoa Aloha Kona Mango
 - Calibrachoa Aloha Tiki Hot Pink
 - Calibrachoa Calita Deep Red
 - Calibrachoa Callie Light Blue
 - Calibrachoa Callie Purple
 - Calibrachoa Callie Rose
 - Calibrachoa Celebration Silver Blue
 - Calibrachoa Celebration Velvet Blue
 - Calibrachoa Colibri Orange
 - Calibrachoa Dream Kisses
 - Calibrachoa Midnight Blue
 - Calibrachoa Superbells Magenta
 - Calibrachoa Superbells Pomegranate Punch
 - Calicotome spinosa
 - Calla palustris
 - Calliandra haematocephala
 - Calliandra tweedii
 - Callicarpa bodinieri
 - Callicarpa bodinieri 'Profusion'
 - Callicarpa bodinieri var. giraldii
 - Callicarpa cathayana
 - Callicarpa dichotoma
 - Callicarpa dichotoma 'Albifructa'
 - Callicarpa dichotoma 'Issai'
 - Callicarpa japonica
 - Callicarpa x shirasawana
 - Callirhoe involucrata
 - Callisia navicularis
 - Callistemon Bronze Wing
 - Callistemon brachyandrus
 - Callistemon comboynensis
 - Callistemon formosus
 - Callistemon linearis
 - Callistemon macropunctatus
 - Callistemon pachyphyllus
 - Callistemon phoeniceus
 - Callistemon rigidus
 - Callistemon sieberi
 - Callistemon speciosus
 - Callistemon viminalis
 - Callistephus chinensis
 - Callistephus chinensis 'Blauer Turm'
 - Callistephus chinensis 'Esmeralda'
 - Callistephus chinensis 'Lux'
 - Callistephus chinensis 'Matsumoto Pink'
 - Callistephus chinensis 'Princess Hilda'
 - Callistephus chinensis 'Prinova Dark Blue'
 - Callistephus chinensis 'Prinova Dark Red'
 - Callistephus chinensis 'Roter Edelstein'
 - Callistephus chinensis 'Serenade'
 - Callistephus chinensis 'Siam'
 - Callistephus chinensis 'Tristan'
 - Calluna vulgaris
 - Calluna vulgaris 'Alba Erecta'
 - Calluna vulgaris 'Anette'
 - Calluna vulgaris 'Annemarie'
 - Calluna vulgaris 'Barnett Anley'
 - Calluna vulgaris 'Beauty Ladies'
 - Calluna vulgaris 'Dark Beauty'
 - Calluna vulgaris 'Garden Girls Alicia'
 - Calluna vulgaris 'Garden Girls Athene'
 - Calluna vulgaris 'Garden Girls Sandy'
 - Calluna vulgaris 'Garden Girls Silvana'
 - Calluna vulgaris 'Garden Girls'
 - Calluna vulgaris 'Hatjes Herbstfeuer'
 - Calluna vulgaris 'Kerstin Jacke'
 - Calluna vulgaris 'Moritz'
 - Calluna vulgaris 'Rote Schlesierperle'
 - Calluna vulgaris 'Serlei'
 - Calluna vulgaris 'Siska'
 - Calluna vulgaris 'Spring Torch'
 - Calluna vulgaris 'Veluwe'
 - Calothamnus chrysantherus
 - Caltha palustris
 - Calycanthus floridus
 - Calycanthus floridus 'Aphrodite'
 - Calystegia sepium
 - Calystegia soldanella
 - Camassia leichtlinii
 - Camassia leichtlinii 'Alba'
 - Camassia leichtlinii 'Caerulea'
 - Camassia quamash
 - Camellia cuspidata
 - Camellia japonica
 - Camellia japonica 'Adolphe Audusson'
 - Camellia japonica 'Althaeiflora'
 - Camellia japonica 'Barbara Clark'
 - Camellia japonica 'Brushfield's Yellow'
 - Camellia japonica 'Chandleri Elegans'
 - Camellia japonica 'Collettii'
 - Camellia japonica 'Comte de Flandre'
 - Camellia japonica 'Contessa Lavinia Maggi'
 - Camellia japonica 'Donckelarii'
 - Camellia japonica 'Dr. Burnside'
 - Camellia japonica 'Drama Girl'
 - Camellia japonica 'Duftglöckchen'
 - Camellia japonica 'Frau Minna Seidel'
 - Camellia japonica 'Freedom Bell'
 - Camellia japonica 'General George Patton'
 - Camellia japonica 'Gloire de Nantes'
 - Camellia japonica 'Hagoromo'
 - Camellia japonica 'Herme'
 - Camellia japonica 'Interval'
 - Camellia japonica 'Jutta'
 - Camellia japonica 'Kewpie Doll'
 - Camellia japonica 'Königsbrück'
 - Camellia japonica 'La Pace'
 - Camellia japonica 'Lady Campbell'
 - Camellia japonica 'Little Lavender'
 - Camellia japonica 'Madame Martin Cachet'
 - Camellia japonica 'Maria Morren'
 - Camellia japonica 'Mathotiana'
 - Camellia japonica 'Nukifude'
 - Camellia japonica 'Otome'
 - Camellia japonica 'Prinz Albert'
 - Camellia japonica 'R.L. Wheeler'
 - Camellia japonica 'Roger Hall'
 - Camellia japonica 'Roma Risorta'
 - Camellia japonica 'Royal Velvet'
 - Camellia japonica 'Scentsation'
 - Camellia japonica 'Tahiti'
 - Camellia japonica 'Tama Bambino'
 - Camellia japonica 'Tama-Ariake'
 - Camellia japonica 'Tama-No-Ura'
 - Camellia japonica 'Tricolor'
 - Camellia japonica 'Tsugawashibori'
 - Camellia japonica 'Utsusemi'
 - Camellia japonica 'Victoria Antwerpensis'
 - Camellia japonica subsp. rusticana 'Botanyuki'
 - Camellia nitidissima
 - Camellia reticulata 'Dream Girl'
 - Camellia reticulata 'Mary Williams'
 - Camellia sasanqua 'Variegata'
 - Camellia sasanqua 'Venus'
 - Camellia sinensis
 - Camellia tsaii
 - Camellia x vernalis 'Sayohime'
 - Camellia x vernalis 'Yuletide'
 - Camellia x williamsii 'Cupcake'
 - Camellia x williamsii 'Jury's Yellow'
 - Campanula alliariifolia
 - Campanula cochleariifolia
 - Campanula glomerata
 - Campanula glomerata 'Acaulis'
 - Campanula grossekii
 - Campanula lactiflora
 - Campanula lactiflora 'Himmelsblau'
 - Campanula lactiflora 'Prichard'
 - Campanula latifolia
 - Campanula medium
 - Campanula persicifolia
 - Campanula portenschlagiana
 - Campanula poscharskyana
 - Campanula poscharskyana 'E.H. Frost'
 - Campanula poscharskyana 'Hirsch White'
 - Campanula poscharskyana 'Stella'
 - Campanula punctata
 - Campanula punctata 'Kent Belle'
 - Campanula punctata 'Sarastro'
 - Campanula punctata x trachelium 'Sarastro'
 - Campanula rapunculoides
 - Campanula rapunculus
 - Campanula takesimana
 - Campanula thyrsoides
 - Campanula trachelium
 - Campanula trachelium 'Bernice'
 - Campsis grandiflora
 - Campsis radicans
 - Campsis radicans 'Flamenco'
 - Campsis radicans 'Stromboli'
 - Campsis x tagliabuana 'Mme Galen'
 - Canarina canariensis
 - Canistrum aurantiacum
 - Canna glauca
 - Canna indica
 - Canna indica 'Golden Gate'
 - Canna indica 'Goldkrone'
 - Canna indica 'Königin Charlotte'
 - Canna indica 'La Gloire'
 - Canna indica 'Liberation'
 - Canna indica 'Lucifer'
 - Canna indica 'Verdi'
 - Canna limbata
 - Cannabis sativa
 - Cannabis sativa var. sativa
 - Cannabis sativa var. spontanea
 - Cantua bicolor
 - Cantua buxifolia
 - Capparis spinosa
 - Capsicum annuum 'Cayenne'
 - Capsicum annuum 'Feher'
 - Capsicum annuum 'Jalastar'
 - Capsicum annuum 'Joe's Long'
 - Capsicum annuum 'Kondom-Paprika'
 - Capsicum annuum 'Palladio'
 - Capsicum annuum 'Ungarische Kirschpaprika'
 - Capsicum annuum var. nigrum 'Black Prince'
 - Capsicum baccatum
 - Capsicum chinense
 - Capsicum frutescens 'Peruvian Purple'
 - Caragana arborescens
 - Caragana frutex
 - Caralluma schweinfurthii
 - Cardamine acris
 - Cardamine amara
 - Cardamine leucantha
 - Cardamine pentaphyllos
 - Cardamine pratensis
 - Cardiospermum halicacabum
 - Carduus nutans
 - Carduus thoermeri
 - Carex comans 'Bronze Form'
 - Carex comans 'Kupferflamme'
 - Carex dolichostachya 'Kaga Nishiki'
 - Carex elata 'Aurea'
 - Carex elata 'Bowles Golden'
 - Carex grayi
 - Carex hachijoensis 'Evergold'
 - Carex hachijoensis 'Everillo'
 - Carex montana
 - Carex morrowii
 - Carex morrowii 'Aureomarginata'
 - Carex morrowii 'Ice Dance'
 - Carex morrowii 'Variegata'
 - Carex muricata
 - Carex oshimensis 'Evergold'
 - Carex oshimensis 'Everillo'
 - Carex pendula
 - Carex remota
 - Carex siderosticha 'Variegata'
 - Carex tenuiculmis
 - Carica cauliflora
 - Carica papaya
 - Carissa macrocarpa
 - Carlina acanthifolia
 - Carlina acaulis
 - Carlina acaulis subsp. simplex
 - Carlina biebersteinii
 - Carlina vulgaris
 - Carlina vulgaris subsp. spinosa
 - Carmona retusa
 - Carpinus betulus
 - Carpinus betulus 'Fastigiata'
 - Carpinus betulus 'Pendula'
 - Carpinus laxiflora
 - Carpinus orientalis
 - Carpobrotus acinaciformis
 - Carruanthus ringens
 - Carthamus tinctorius
 - Carum carvi
 - Carya cordiformis
 - Carya illinoinensis
 - Carya ovata
 - Caryopteris divaricata
 - Caryopteris x clandonensis
 - Caryopteris x clandonensis 'Arthur Simmonds'
 - Caryopteris x clandonensis 'Beyond Midnight'
 - Caryopteris x clandonensis 'Blue Balloon'
 - Caryopteris x clandonensis 'Dark Knight'
 - Caryopteris x clandonensis 'Grand Bleu'
 - Caryopteris x clandonensis 'Heavenly Blue'
 - Caryopteris x clandonensis 'Summer Sorbet'
 - Caryopteris x clandonensis 'Sunny Blue'
 - Caryopteris x clandonensis 'Worcester Gold'
 - Caryota mitis
 - Cassia artemisioides
 - Cassia corymbosa
 - Cassia didymobotrya
 - Cassia emarginata
 - Cassia floribunda
 - Cassia hebecarpa
 - Cassia senna
 - Cassia spectabilis
 - Cassia tora
 - Castanea sativa
 - Castanea sativa 'Belle Epine'
 - Castanea sativa 'Bouche Rouge'
 - Castanea sativa 'Ecker 1'
 - Castanea sativa 'Lyon'
 - Castanea sativa 'Marigoule'
 - Castanea sativa 'Variegata'
 - Castilla elastica
 - Catalpa bignonioides
 - Catalpa bignonioides 'Nana'
 - Catalpa bungei
 - Catalpa ovata
 - Catharanthus roseus
 - Catharanthus trichophyllus
 - Cattleya bowringiana
 - Caularthron bicornutum
 - Cautleya gracilis
 - Ceanothus insularis
 - Ceanothus thyrsiflorus
 - Ceanothus x delilianus 'Gloire de Versailles'
 - Ceanothus x delilianus 'Topaze'
 - Ceanothus x pallidus 'Marie Simon'
 - Cedrus atlantica
 - Cedrus atlantica 'Glauca Pendula'
 - Cedrus atlantica 'Glauca'
 - Cedrus deodara
 - Cedrus deodara 'Eisregen'
 - Cedrus deodara 'Feelin Blue'
 - Cedrus deodara 'Golden Horizon'
 - Cedrus deodara 'Pendula'
 - Cedrus libani 'Glauca Fastigiata'
 - Cedrus libani 'Sargentii'
 - Cedrus libani subsp. libani
 - Cedrus libani subsp. stenocoma
 - Ceiba insignis
 - Ceiba pentandra
 - Ceiba speciosa
 - Celastrus orbiculatus
 - Celastrus orbiculatus 'Diana'
 - Celastrus rosthornianus
 - Celastrus scandens
 - Celosia argentea
 - Celosia argentea var. argentea
 - Celosia argentea var. cristata
 - Celosia argentea var. plumosa
 - Celosia argentea var. plumosa 'Fresh Look Red'
 - Celtis occidentalis
 - Celtis sinensis
 - Centaurea cyanus
 - Centaurea dealbata
 - Centaurea hypoleuca
 - Centaurea jacea
 - Centaurea macrocephala
 - Centaurea montana
 - Centaurea montana 'Grandiflora'
 - Centaurea nigra
 - Centaurea rupestris
 - Centaurea scabiosa
 - Centaurea simplicicaulis
 - Centaurium erythraea
 - Centranthus angustifolius
 - Centranthus ruber
 - Centranthus ruber 'Albus'
 - Centranthus ruber 'Coccineus'
 - Centratherum punctatum
 - Cephalanthera rubra
 - Cephalanthus occidentalis
 - Cephalanthus occidentalis 'Sugar Shack'
 - Cephalaria gigantea
 - Cephalaria transsylvanica
 - Cephalophora aromatica
 - Cephalotaxus harringtonia 'Fastigiata'
 - Cephalotaxus harringtonia var. drupacea
 - Cerastium arvense
 - Cerastium biebersteinii
 - Cerastium carintiacum
 - Cerastium strictum
 - Cerastium tomentosum
 - Cerastium tomentosum var. aetnaeum
 - Cerastium tomentosum var. columnae
 - Ceratonia siliqua
 - Ceratopetalum gummifera
 - Ceratopetalum gummifera 'Christmas Snow'
 - Ceratostigma plumbaginoides
 - Ceratozamia mexicana
 - Cercidiphyllum japonicum
 - Cercidiphyllum japonicum 'Pendulum'
 - Cercidiphyllum japonicum 'Rotfuchs'
 - Cercis canadensis
 - Cercis canadensis 'Eternal Flame'
 - Cercis canadensis 'Forest Pansy'
 - Cercis canadensis 'Lavender Twist'
 - Cercis chinensis
 - Cercis chinensis 'Avondale'
 - Cercis griffithii
 - Cercis siliquastrum
 - Cereus uruguayanus 'Monstrosus'
 - Cerinthe minor
 - Cerinthe minor subsp. minor
 - Ceropegia dichotoma
 - Ceropegia sandersonii
 - Ceropegia stapeliiformis
 - Cestrum aurantiacum
 - Cestrum confertum
 - Cestrum elegans
 - Cestrum nocturnum
 - Cestrum parqui
 - Cestrum suberosum
 - Chaenomeles cathayensis
 - Chaenomeles japonica
 - Chaenomeles sinensis
 - Chaenomeles speciosa
 - Chaenomeles speciosa 'Moerloosei'
 - Chaenomeles speciosa 'Nivalis'
 - Chaenomeles speciosa 'Scarlet Storm'
 - Chaenomeles speciosa 'Semperflorens'
 - Chaenomeles speciosa 'Versicolor'
 - Chaenomeles x superba
 - Chaenomeles x superba 'Alba'
 - Chaenomeles x superba 'Crimson and Gold'
 - Chaenomeles x superba 'Fusion'
 - Chaenomeles x superba 'Hollandia'
 - Chaenomeles x superba 'Pink Lady'
 - Chaenorhinum origanifolium 'Blue Dream'
 - Chaerophyllum aureum
 - Chaetopappa ericoides
 - Chamaecrista glandulosa
 - Chamaecyparis lawsoniana
 - Chamaecyparis lawsoniana 'Blaue Bautzener'
 - Chamaecyparis lawsoniana 'Columnaris Glauca'
 - Chamaecyparis lawsoniana 'Snow White'
 - Chamaecyparis lawsoniana 'Yvonne'
 - Chamaecyparis obtusa
 - Chamaecyparis obtusa 'Fernspray Gold'
 - Chamaecyparis obtusa 'Nana Gracilis'
 - Chamaecyparis pisifera
 - Chamaecyparis pisifera 'Filifera Aurea'
 - Chamaecyparis pisifera 'Filifera'
 - Chamaecytisus falcatus
 - Chamaecytisus purpureus
 - Chamaecytisus ratisbonensis
 - Chamaecytisus ruthenicus
 - Chamaecytisus supinus
 - Chamaecytisus triflorus
 - Chamaedorea tepejilote
 - Chamaemelum nobile 'Plena'
 - Chamaerops humilis
 - Chamaespartium sagittale
 - Charybdis maritima
 - Chasmanthe bicolor
 - Chasmanthe floribunda
 - Chasmanthium latifolium
 - Chelidonium majus
 - Chelone obliqua
 - Chenopodium ambrosioides var. anthelminticum
 - Chenopodium bonus-henricus
 - Chenopodium foliosum
 - Chenopodium giganteum 'Magentaspreen'
 - Chiastophyllum oppositifolium
 - Chimonanthus praecox
 - Chionanthus virginicus
 - Chionodoxa forbesii
 - Chionodoxa forbesii 'Pink Giant'
 - Chionodoxa luciliae
 - Chirita eberhardtii
 - Chlorophytum comosum 'Variegatum'
 - Choisya ternata
 - Choisya ternata 'Aztec Pearl'
 - Choisya ternata 'Sundance'
 - Choisya ternata 'White Dazzler'
 - Choisya x dewitteana 'Aztec Pearl'
 - Choisya x dewitteana 'Sundance'
 - Choisya x dewitteana 'White Dazzler'
 - Chorisia insignis
 - Chorisia speciosa
 - Chrysalidocarpus lutescens
 - Chrysanthemum arcticum
 - Chrysanthemum coronarium
 - Chrysanthemum indicum 'Anastasia'
 - Chrysanthemum indicum 'Bronzeteppich'
 - Chrysanthemum indicum 'Cinderella'
 - Chrysanthemum indicum 'Dreamstar Balios'
 - Chrysanthemum indicum 'Fellbacher Wein'
 - Chrysanthemum indicum 'Goldmarianne'
 - Chrysanthemum indicum 'Granatschopf'
 - Chrysanthemum indicum 'Herbstbrokat'
 - Chrysanthemum indicum 'Isabellarosa'
 - Chrysanthemum indicum 'Karminriese'
 - Chrysanthemum indicum 'Karminsilber'
 - Chrysanthemum indicum 'Kleiner Bernstein'
 - Chrysanthemum indicum 'L'Innocence'
 - Chrysanthemum indicum 'Lachsrote Wolke'
 - Chrysanthemum indicum 'Lichtkuppel'
 - Chrysanthemum indicum 'Manito'
 - Chrysanthemum indicum 'Nebelrose'
 - Chrysanthemum indicum 'Nordlicht'
 - Chrysanthemum indicum 'Rehauge'
 - Chrysanthemum indicum 'Rosalinde'
 - Chrysanthemum indicum 'Rosenmarguerite'
 - Chrysanthemum indicum 'Rumpelstilzchen'
 - Chrysanthemum indicum 'Schweizerland'
 - Chrysanthemum indicum 'Twinkle'
 - Chrysanthemum indicum 'Vesuv'
 - Chrysanthemum indicum 'Vreneli'
 - Chrysanthemum indicum 'Weisser Riese'
 - Chrysanthemum pacificum 'Silver Gold'
 - Chrysanthemum rubellum 'Mary Stoker'
 - Chrysanthemum segetum
 - Chrysanthemum shiwogiku
 - Chrysanthemum x hortorum 'Königssohn'
 - Chrysanthemum x hortorum 'Pinky'
 - Chrysosplenium alternifolium
 - Chusquea quila
 - Cichorium endivia
 - Cichorium intybus
 - Cichorium intybus 'Catalogna Puntarelle'
 - Cichorium intybus 'Red Rib'
 - Cicuta virosa
 - Cimicifuga racemosa
 - Cimicifuga racemosa 'Atropurpurea'
 - Cimicifuga rubifolia
 - Cimicifuga simplex
 - Cimicifuga simplex 'Armleuchter'
 - Cimicifuga simplex 'Chocoholic'
 - Cimicifuga simplex 'Pink Spike'
 - Cinnamomum aromaticum
 - Cinnamomum camphora
 - Cinnamomum glandulifera
 - Cirsium acaule
 - Cirsium arvense
 - Cirsium canum
 - Cirsium diacanthum
 - Cirsium eriophorum
 - Cirsium heterophyllum
 - Cirsium ligulare
 - Cirsium oleraceum
 - Cirsium rivulare 'Atropurpureum'
 - Cirsium spinosissimum
 - Cirsium vulgare
 - Cistus albanicus
 - Cistus albidus
 - Cistus creticus
 - Cistus crispus
 - Cistus cymosus
 - Cistus heterophyllus
 - Cistus incanus
 - Cistus incanus subsp. creticus
 - Cistus ladanifer
 - Cistus laurifolius
 - Cistus monspeliensis
 - Cistus palhinhae
 - Cistus parviflorus
 - Cistus salviifolius
 - Cistus salviifolius 'Prostratus'
 - Cistus symphytifolius
 - Cistus x purpureus 'Betty Taudevin'
 - Cistus x skanbergii
 - Citrofortunella microcarpa
 - Citrullus colocynthis
 - Citrus aurantifolia x Fortunella margarita
 - Citrus aurantium
 - Citrus aurantium 'Corniculata'
 - Citrus aurantium 'Dolce del Gargano'
 - Citrus latifolia
 - Citrus limon
 - Citrus limon 'Fiore'
 - Citrus limon 'Rosso'
 - Citrus maxima
 - Citrus medica 'Digitata'
 - Citrus medica 'Maxima'
 - Citrus medica var. sarcodactylis
 - Citrus reticulata
 - Citrus sinensis
 - Citrus x limonia
 - Citrus x paradisi
 - Cladanthus arabicus
 - Cladrastis kentukea
 - Cladrastis lutea
 - Clarkia amoena
 - Clarkia concinna
 - Clarkia pulchella
 - Claytonia sibirica
 - Cleistocactus anguinus
 - Cleistocactus baumannii
 - Cleistocactus brookei
 - Cleistocactus hyalacanthus
 - Cleistocactus jujuyensis
 - Cleistocactus palhuayensis
 - Cleistocactus samaipatanus
 - Clematis Arabella
 - Clematis Asagasumi
 - Clematis Asao
 - Clematis Ashva
 - Clematis Blekitny Aniol
 - Clematis Blue Angel
 - Clematis Blue Belle
 - Clematis Boulevard Ninon
 - Clematis Bourbon
 - Clematis Burning Love 'Vitiwester'
 - Clematis Chathsworth
 - Clematis Comtesse de Bouchaud
 - Clematis Crystal Fountain
 - Clematis Dr. Ruppel
 - Clematis Durandii
 - Clematis Eetika
 - Clematis Empress
 - Clematis Ernest Markham
 - Clematis Etoile Violette
 - Clematis Freda
 - Clematis Fujimusume
 - Clematis General Sikorski
 - Clematis Gipsy Queen
 - Clematis Gladys Picard
 - Clematis Hagleys Hybrid
 - Clematis Inspiration
 - Clematis Liberty
 - Clematis Lucky Charm
 - Clematis Madame Julia Correvon
 - Clematis Marjorie
 - Clematis Mayleen
 - Clematis Miss Bateman
 - Clematis Mrs Cholmondeley
 - Clematis Mrs Robert Brydon
 - Clematis Multi Blue
 - Clematis Nelly Moser
 - Clematis Niobe
 - Clematis Olympia
 - Clematis Omoshiro
 - Clematis Ooh La La
 - Clematis Paul Farges
 - Clematis Perle d'Azur
 - Clematis Piilu
 - Clematis Pink Fantasy
 - Clematis Prince Charles
 - Clematis Rooguchi
 - Clematis Rouge Cardinal
 - Clematis Stand by Me
 - Clematis Star River
 - Clematis The President
 - Clematis The Vagabond
 - Clematis Tudor
 - Clematis Ville de Lyon
 - Clematis Viola
 - Clematis Warszawska Nike
 - Clematis Westerplatte
 - Clematis alpina
 - Clematis alpina 'Frances Rives'
 - Clematis alpina 'Ruby'
 - Clematis alpina 'White Columbine'
 - Clematis chiisanensis
 - Clematis crispa
 - Clematis diversifolia 'Durandii'
 - Clematis fargesii
 - Clematis flammula
 - Clematis glauca
 - Clematis heracleifolia
 - Clematis heracleifolia 'Côte d'Azur'
 - Clematis integrifolia
 - Clematis integrifolia 'Aromatica'
 - Clematis integrifolia 'Juuli'
 - Clematis integrifolia 'Rosea'
 - Clematis koreana
 - Clematis macropetala
 - Clematis macropetala 'Markham's Pink'
 - Clematis mandshurica
 - Clematis montana
 - Clematis montana 'Marjorie'
 - Clematis montana 'Rubens'
 - Clematis montana 'Tetrarose'
 - Clematis montana var. grandiflora
 - Clematis montana var. rubens
 - Clematis patens
 - Clematis pierottii
 - Clematis potaninii
 - Clematis recta
 - Clematis rehderiana
 - Clematis serratifolia
 - Clematis songarica
 - Clematis stans
 - Clematis tangutica
 - Clematis terniflora
 - Clematis terniflora var. mandshurica
 - Clematis texensis 'Princess Diana'
 - Clematis texensis 'Princess of Wales'
 - Clematis tibetana
 - Clematis vitalba
 - Clematis viticella
 - Clematis viticella 'Abundance'
 - Clematis viticella 'Alba Luxurians'
 - Clematis viticella 'Aotearoa'
 - Clematis viticella 'Lady Betty Balfour'
 - Clematis viticella 'Prince Charles'
 - Clematis viticella 'Romantika'
 - Clematis viticella 'Venosa Violacea'
 - Clematis viticella 'Viola'
 - Clematis x aromatica
 - Clematis x jackmanii
 - Clematis x jackmanii 'Superba'
 - Clematis x jouiniana 'Praecox'
 - Clematis x triternata 'Rubromarginata'
 - Cleome hassleriana
 - Cleome hassleriana 'Helen Campbell'
 - Cleome hassleriana 'Kirschkönigin'
 - Cleome hassleriana 'Señorita Rosalita'
 - Cleome hassleriana 'Sparkler Blush'
 - Cleome hassleriana 'Sparkler Lavender'
 - Cleome hassleriana 'Sparkler White'
 - Cleome spinosa
 - Cleome spinosa 'Helen Campbell'
 - Cleome spinosa 'Kirschkönigin'
 - Cleome spinosa 'Señorita Rosalita'
 - Cleome spinosa 'Sparkler Blush'
 - Cleome spinosa 'Sparkler Lavender'
 - Cleome spinosa 'Sparkler White'
 - Clerodendron chinense 'Plenum'
 - Clerodendron myricoides 'Ugandense'
 - Clerodendron speciosissimum
 - Clerodendron speciosum
 - Clerodendron thomsoniae
 - Clerodendron trichotomum
 - Clerodendron trichotomum var. fargesii
 - Clerodendron trichotomum var. trichotomum
 - Clerodendron ugandense
 - Clerodendrum chinense 'Plenum'
 - Clerodendrum myricoides 'Ugandense'
 - Clerodendrum paniculatum
 - Clerodendrum philippinum
 - Clerodendrum speciosissimum
 - Clerodendrum thomsoniae
 - Clerodendrum trichotomum
 - Clerodendrum trichotomum var. fargesii
 - Clerodendrum trichotomum var. trichotomum
 - Clerodendrum ugandense
 - Clerodendrum x speciosum
 - Clethra alnifolia
 - Clethra alnifolia 'Ruby Spice'
 - Clethra barbinervis
 - Clianthus puniceus
 - Clianthus puniceus 'Albus'
 - Clinopodium menthifolium subsp. menthifolium
 - Clinopodium vulgare
 - Clitoria ternatea
 - Clivia miniata
 - Clivia x cyrtanthiflora
 - Cnicus benedictus
 - Cnidium silaifolium
 - Cobaea scandens
 - Cochliasanthus caracalla
 - Cochliostema odoratissimum
 - Cochlospermum religiosum
 - Cocos nucifera
 - Codiaeum variegatum
 - Codonopsis clematidea
 - Codonopsis lanceolata
 - Coelogyne brachyptera
 - Coelogyne cristata
 - Coelogyne cristata 'Chatsworthii'
 - Coelogyne dayana
 - Coelogyne massangeana
 - Coelogyne mooreana
 - Coelogyne nitida
 - Coelogyne ochracea
 - Coelogyne ovalis
 - Coelogyne tomentosa
 - Coelogyne trinervis
 - Coelogyne x burfordiense
 - Coffea excelsa
 - Coffea liberica
 - Coffea liberica var. dewevrei
 - Colax viridis
 - Colchicum Lilac Wonder
 - Colchicum Waterlily
 - Colchicum autumnale
 - Colchicum autumnale 'Alboplenum'
 - Colchicum bulbocodium
 - Colchicum byzanthinum
 - Colchicum montanum
 - Colchicum soboliferum
 - Colchicum speciosum
 - Coleogyne ramosissima
 - Coleus blumei
 - Coleus blumei 'Bronze Age'
 - Coleus blumei 'Caipirinha'
 - Coleus blumei 'Combat'
 - Coleus blumei 'Fireball'
 - Coleus blumei 'Fishnet Stockings'
 - Coleus blumei 'Kiwi Fern'
 - Coleus blumei 'Malibu Apricot'
 - Coleus blumei 'Mission Gem'
 - Coleus blumei 'Nevada'
 - Coleus blumei 'Otto Mann'
 - Coleus blumei 'Pineapple Beauty'
 - Coleus blumei 'Saturan'
 - Coleus blumei 'Sedona'
 - Coleus blumei 'Wizard Mix'
 - Coleus blumei 'Wizard Sunset Orange'
 - Colletia cruciata
 - Colletia paradoxa
 - Collinsia bicolor
 - Collinsia heterophylla
 - Collomia grandiflora
 - Colocasia gigantea
 - Coluria geoides
 - Colutea arborescens
 - Colutea orientalis
 - Colutea paulsenii
 - Coluteocarpus vesicaria
 - Commelina benghalensis
 - Commelina tuberosa
 - Congea griffithiana
 - Congea tomentosa
 - Conium maculatum
 - Consolida ajacis
 - Consolida regalis
 - Convallaria majalis
 - Convallaria majalis 'Rosea'
 - Convolvulus althaeoides
 - Convolvulus arvensis
 - Convolvulus cneorum
 - Convolvulus sepium
 - Convolvulus tricolor
 - Cordyline australis 'Purpurea'
 - Cordyline fruticosa
 - Coreopsis basalis
 - Coreopsis grandiflora
 - Coreopsis grandiflora 'Sonnenkind'
 - Coreopsis grandiflora 'Sunray'
 - Coreopsis lanceolata
 - Coreopsis tinctoria
 - Coreopsis tripteris
 - Coreopsis verticillata
 - Coriandrum sativum
 - Cornus Porlock
 - Cornus Starlight
 - Cornus alba
 - Cornus alba 'Argenteomarginata'
 - Cornus alba 'Ivory Halo'
 - Cornus alba 'Kesselringii'
 - Cornus alba 'Sibirica Ruby'
 - Cornus alba 'Sibirica Variegata'
 - Cornus alba 'Sibirica'
 - Cornus alba 'Spaethii'
 - Cornus alternifolia
 - Cornus alternifolia 'Golden Shadows'
 - Cornus canadensis
 - Cornus controversa
 - Cornus controversa 'Carpe Diem'
 - Cornus controversa 'Variegata'
 - Cornus florida
 - Cornus florida 'Cherokee Sunset'
 - Cornus florida 'Eddie's White Wonder'
 - Cornus florida 'Rainbow'
 - Cornus florida 'Rubra'
 - Cornus florida 'Sweetwater'
 - Cornus kousa
 - Cornus kousa 'China Girl'
 - Cornus kousa 'Gold Star'
 - Cornus kousa 'Milky Way'
 - Cornus kousa 'Satomi'
 - Cornus kousa 'Scarlet Fire'
 - Cornus kousa 'Schmetterling'
 - Cornus kousa 'Silber Pheasant'
 - Cornus kousa 'Teutonia'
 - Cornus kousa 'Venus'
 - Cornus kousa 'Wieting's Select'
 - Cornus kousa var. chinensis
 - Cornus macrophylla
 - Cornus mas
 - Cornus mas 'Aurea'
 - Cornus mas 'Jolico'
 - Cornus mas 'Kasanlak'
 - Cornus mas 'Schönbrunner Gourmetdirndl'
 - Cornus officinalis
 - Cornus sanguinea
 - Cornus sanguinea 'Anny's Winter Orange'
 - Cornus sanguinea 'Magic Flame'
 - Cornus sanguinea 'Midwinter Fire'
 - Cornus sanguinea 'Winter Beauty'
 - Cornus sericea 'Budd's Yellow'
 - Cornus sericea 'Flaviramea'
 - Cornus sericea 'White Gold'
 - Cornus stolonifera 'Budd's Yellow'
 - Cornus stolonifera 'Flaviramea'
 - Cornus stolonifera 'White Gold'
 - Coronilla juncea
 - Coronilla valentina subsp. glauca
 - Coronilla varia
 - Correa alba
 - Cortaderia selloana
 - Cortaderia selloana 'Pumila'
 - Cortia wallichiana
 - Corydalis cava
 - Corydalis elata 'Spinners'
 - Corydalis elata x flexuosa 'Tory MP'
 - Corydalis flexuosa 'Père David'
 - Corydalis lutea
 - Corydalis nobilis
 - Corydalis ochroleuca
 - Corydalis ophiocarpa
 - Corydalis solida
 - Corydalis solida 'GP Baker'
 - Corydalis solida subsp. transsylvanica
 - Corylopsis glabrescens
 - Corylopsis glandulifera var. hypoglauca
 - Corylopsis pauciflora
 - Corylopsis sinensis 'Spring Purple'
 - Corylopsis spicata
 - Corylopsis willmottiae
 - Corylus avellana
 - Corylus avellana 'Barcelloner Eckige'
 - Corylus avellana 'Contorta'
 - Corylus avellana 'Corabel'
 - Corylus avellana 'Daria'
 - Corylus avellana 'Englische Riesen'
 - Corylus avellana 'Gubener Zellernuss'
 - Corylus avellana 'Gunslebener Zellernuss'
 - Corylus avellana 'Hallesche Riesen'
 - Corylus avellana 'Kataloński'
 - Corylus avellana 'Lange Zellernuss'
 - Corylus avellana 'Purple Haze'
 - Corylus avellana 'Rote Zellernuss'
 - Corylus avellana 'Samsun'
 - Corylus avellana 'Webbs Preisnuss'
 - Corylus ferox
 - Corylus maxima
 - Corylus maxima 'Purpurea'
 - Corylus sieboldiana
 - Corymbia citriodora
 - Corymbia ficifolia
 - Corymbia ficifolia 'Orange Splendour'
 - Corymbia ficifolia 'Summer Red'
 - Corymbia ficifolia 'Wildfire Red'
 - Coryphantha erecta
 - Cosmos atrosanguineus
 - Cosmos bipinnatus
 - Cosmos bipinnatus 'Double Click Rose Bonbon'
 - Cosmos bipinnatus 'Double Click Snow Puff'
 - Cosmos bipinnatus 'Frühwunder'
 - Cosmos sulphureus
 - Costus malortieanus
 - Costus speciosus
 - Cota altissima
 - Cota tinctoria
 - Cota tinctoria 'E.C. Buxton'
 - Cota tinctoria 'Sauce Hollandaise'
 - Cota tinctoria 'Susanna Mitchell'
 - Cotinus coggygria
 - Cotinus coggygria 'Golden Lady'
 - Cotinus coggygria 'Golden Spirit'
 - Cotinus coggygria 'Royal Purple'
 - Cotinus coggygria 'Winecraft Gold'
 - Cotinus coggygria 'Young Lady'
 - Cotoneaster boreali-chinensis
 - Cotoneaster bullatus
 - Cotoneaster dammeri 'Evergreen'
 - Cotoneaster dammeri 'Skogsholmen'
 - Cotoneaster dammeri var. radicans
 - Cotoneaster dielsianus
 - Cotoneaster dielsianus var. elegans
 - Cotoneaster divaricatus
 - Cotoneaster floccosus
 - Cotoneaster foveolatus
 - Cotoneaster frigidus
 - Cotoneaster frigidus 'Vicaryi'
 - Cotoneaster horizontalis
 - Cotoneaster insculptus
 - Cotoneaster integrifolius
 - Cotoneaster multiflorus
 - Cotoneaster procumbens
 - Cotoneaster racemiflora var. royleana
 - Cotoneaster salicifolius
 - Cotoneaster salicifolius 'Parkteppich'
 - Cotoneaster salicifolius 'Pendulus'
 - Cotoneaster salicifolius var. floccosus
 - Cotoneaster simonsii
 - Couroupita guianensis
 - Cousinia pterocaulos
 - Crambe cordifolia
 - Crambe maritima
 - Crassocephalum vitellinum
 - Crassula arborescens
 - Crassula arborescens subsp. undulatifolia
 - Crassula multicava
 - Crassula muscosa 'Monstrosa'
 - Crassula nemorosa
 - Crassula ovata
 - Crassula rupestris
 - Crassula sarcocaulis
 - Crassula socialis
 - Crassula swaziensis
 - Crataegomespilus grandiflorus
 - Crataegomespilus potsdamiensis
 - Crataegus crus-galli
 - Crataegus durobrivensis
 - Crataegus intricata
 - Crataegus laevigata
 - Crataegus laevigata 'Paul's Scarlett'
 - Crataegus laevigata 'Paulii'
 - Crataegus microphylla
 - Crataegus monogyna
 - Crataegus monogyna 'Rosea'
 - Crataegus monogyna subsp. monogyna
 - Crataegus pennsylvanica
 - Crataegus pentagyna
 - Crataegus pinnatifida var. major
 - Crataegus punctata
 - Crataegus succulenta
 - Crataegus x grignonensis
 - Crataegus x lavallei 'Carrierei'
 - Crataegus x persimilis
 - Crataegus x persimilis 'MacLeod'
 - Crataegus x persimilis 'Splendens'
 - Crataegus x prunifolia
 - Crataegus x prunifolia 'MacLeod'
 - Crataegus x prunifolia 'Splendens'
 - Craterostigma pumilum
 - Crepis sibirica
 - Crinodendron hookerianum
 - Crinum augustum
 - Crinum bulbispermum
 - Crinum erubescens
 - Crinum firmifolium
 - Crinum purpurascens
 - Crinum x powellii
 - Crocosmia masoniorum
 - Crocosmia x crocosmiiflora
 - Crocosmia x crocosmiiflora 'Emberglow'
 - Crocosmia x crocosmiiflora 'Fire King'
 - Crocosmia x crocosmiiflora 'Lucifer'
 - Crocosmia x crocosmiiflora 'Star of the East'
 - Crocus biflorus
 - Crocus chrysanthus 'Dorothy'
 - Crocus flavus
 - Crocus imperati 'De Jager'
 - Crocus korolkowii
 - Crocus kotschyanus
 - Crocus speciosus
 - Crocus tommasinianus
 - Crocus vernus
 - Crocus vernus 'Pickwick'
 - Crotalaria juncea
 - Crotalaria laburnifolia
 - Croton variegatus
 - Crowea Festival
 - Cruciata laevipes
 - Cryptantha virgata
 - Cryptanthus zonatus
 - Cryptocoryne merkusii
 - Cryptomeria japonica
 - Cryptomeria japonica 'Elegans Viridis'
 - Cryptomeria japonica 'Globosa Nana'
 - Cryptomeria japonica 'Kai-Suki'
 - Cryptomeria japonica 'Monstrosa Nana'
 - Cryptomeria japonica 'Monstrosa'
 - Cucumis melo
 - Cucumis sativus
 - Cucumis sativus 'Picolino'
 - Cucurbita ficifolia
 - Cucurbita maxima
 - Cucurbita maxima 'Blue Hubbard'
 - Cucurbita maxima 'Gelber Zentner'
 - Cucurbita maxima 'Giraumon Galeux d'Eysines'
 - Cucurbita maxima 'Green Hokkaido'
 - Cucurbita maxima 'Hokkaido'
 - Cucurbita maxima 'Lakota'
 - Cucurbita maxima 'Petita'
 - Cucurbita maxima 'Pink Jumbo Banana'
 - Cucurbita maxima 'Rouge Vif d'Etampes'
 - Cucurbita maxima convar. turbaniformis
 - Cucurbita moschata
 - Cucurbita pepo
 - Cucurbita pepo 'Acorn'
 - Cucurbita pepo 'Aladdin'
 - Cucurbita pepo 'Carnival'
 - Cucurbita pepo 'Sweet Lightning'
 - Cucurbita pepo 'Tristar'
 - Cucurbita pepo 'Vegetable Spaghetti'
 - Cucurbita pepo convar. giromontiina
 - Cucurbita pepo convar. giromontiina 'Black Beauty'
 - Cucurbita pepo convar. giromontiina 'Diamant'
 - Cucurbita pepo convar. giromontiina 'Eight Ball'
 - Cucurbita pepo var. oleifera
 - Cucurbita pepo var. styriaca
 - Cunninghamia lanceolata
 - Cunninghamia lanceolata 'Glauca'
 - Cunonia capensis
 - Cupaniopsis anacardioides
 - Cuphea cyanea 'Harlekin'
 - Cuphea hyssopifolia
 - Cuphea ignea
 - Cuphea lanceolata
 - Cuphea llavea 'Tiny Mice'
 - Cuphea llavea 'Vienco Burgundy'
 - Cuphea micropetala
 - Cuphea procumbens
 - Cuphea viscosissima
 - Cuphea x purpurea 'Firefly'
 - Cupressocyparis leylandii 'Castlewellan Gold'
 - Cupressus arizonica 'Fastigiata'
 - Cupressus arizonica 'Glauca'
 - Cupressus lambertiana
 - Cupressus macrocarpa
 - Cupressus sempervirens 'Stricta'
 - Curcuma Gingerstar Red Torch
 - Curcuma alismatifolia
 - Cyathea cooperi
 - Cycas circinalis
 - Cycas revoluta
 - Cyclamen coum
 - Cyclamen coum 'Silver Leaf'
 - Cyclamen hederifolium
 - Cyclamen hederifolium 'Amaze Me'
 - Cyclamen neapolitanum
 - Cyclamen neapolitanum 'Amaze Me'
 - Cyclamen persicum
 - Cyclanthera brachystachya
 - Cyclanthera pedata
 - Cydonia oblonga
 - Cydonia oblonga 'Adamsova'
 - Cydonia oblonga 'Champion'
 - Cydonia oblonga 'Cydopom'
 - Cydonia oblonga 'Cydora'
 - Cydonia oblonga 'Hruskovita'
 - Cydonia oblonga 'Ingenheimer Bombenquitte'
 - Cydonia oblonga 'Izobilnaja'
 - Cydonia oblonga 'Japlowida Plowidivskaja'
 - Cydonia oblonga 'Konstantinopeler'
 - Cydonia oblonga 'Krymska'
 - Cydonia oblonga 'Ludovic'
 - Cydonia oblonga 'Matador'
 - Cydonia oblonga 'Radonia'
 - Cydonia oblonga 'Riesenquitte von Leskovac'
 - Cydonia oblonga 'Ronda'
 - Cydonia oblonga 'Turkey No.4'
 - Cydonia oblonga 'Wudonia'
 - Cymbalaria muralis
 - Cymbalaria muralis 'Alba'
 - Cymbalaria pallida
 - Cymbidium Arabian Nights Cookbridge
 - Cymbidium Burgundian Cella Opulenta
 - Cymbidium Durham Castle Irene
 - Cymbidium Fascination x Sensation x devonianum
 - Cymbidium Passat
 - Cymbidium Pico Bello
 - Cymbidium Pirouette
 - Cymbidium Samaerkand Montecito
 - Cymbidium iridioides
 - Cymbidium lowianum
 - Cymbopogon nardus
 - Cymopterus alpina
 - Cynanchum ascyrifolium
 - Cynanchum caudatum
 - Cynara cardunculus
 - Cynara cardunculus 'Green Globe'
 - Cynara scolymus
 - Cynara scolymus 'Green Globe'
 - Cynoglossum amabile
 - Cynoglossum officinale
 - Cypella herbertii
 - Cyperus alternifolius
 - Cyperus prolifer
 - Cyphomandra betacea
 - Cypripedium Barbarossa
 - Cypripedium Hank Small
 - Cypripedium Kentucky Maxi
 - Cypripedium Ulla Silkens
 - Cypripedium calceolus
 - Cypripedium parviflorum
 - Cypripedium parviflorum var. pubescens
 - Cypripedium reginae
 - Cypripedium x ventricosum
 - Cyrtomium fortunei
 - Cyrtostachys renda
 - Cytisus battandieri
 - Cytisus nigricans
 - Cytisus nigricans 'Cyni'
 - Cytisus purgans
 - Cytisus scoparius
 - Cytisus scoparius 'Goldfinch'
 - Cytisus scoparius 'Mrs Norman Henry'
 - Cytisus scoparius 'Red Wings'
 - Cytisus scoparius 'Roter Favorit'
 - Cytisus x kewensis
 - Cytisus x praecox
 - Cytisus x praecox 'Allgold'
 - Cytisus x praecox 'Hollandia'