Scientific names: 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'
- 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 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 '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 Burning Love 'Vitiwester'
- Clematis Chathsworth
- Clematis Comtesse de Bouchaud
- Clematis Crystal Fountain
- Clematis Dr. Ruppel
- Clematis Durandii
- Clematis Eetika
- Clematis Ernest Markham
- Clematis Etoile Violette
- Clematis Freda
- Clematis Fujimusume
- Clematis General Sikorski
- Clematis Gipsy Queen
- Clematis Gladys Picard
- Clematis Hagleys Hybrid
- Clematis Madame Julia Correvon
- Clematis Mayleen
- Clematis Miss Bateman
- Clematis Mrs Cholmondeley
- Clematis Mrs Robert Brydon
- Clematis Multi Blue
- Clematis Nelly Moser
- Clematis Niobe
- Clematis Omoshiro
- 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 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 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 '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 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 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'