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Latin Name C
Cuscuta approximata
Cacalia atriplicifolia
Cacalia auriculata
Cacalia delphinifolium
Cacalia farfaraefolia
Cacalia firma
Cacalia hastata orientalis
Cacalia hastata tanakae
Cacalia kiusiana
Cacalia nikomontana
Cacalia peltifolia
Cacalia pseudo-taimingasa
Caesalpinia decapetala
Caesia calliantha
Caesia parviflora
Caesia vittata
Cakile edentula
Cakile maritima
Caladium bicolor
Calamintha grandiflora
Calamintha nepeta
Calamintha sylvatica
Calamus scipionum
Calandrinia balonensis
Calandrinia ciliata
Calandrinia ciliata menziesii
Calandrinia polyandra
Calandrinia remota
Calceolaria arachnoidea
Calceolaria thyrsiflora
Calendula arvensis
Calendula officinalis
Calicotome spinosa
Calicotome villosa
Calla palustris
Callicarpa americana
Callicarpa bodinieri var. girldali 'Profusion'
Callicarpa japonica
Callicarpa macrophylla
Callicarpa mollis
Callicarpa pedunculata
Callicoma serratifolia
Calligonum aphyllum
Callirhoe digitata
Callirhoe involucrata
Callirhoe leiocarpa
Callistemon citrinus
Callistephus chinensis 'Carpet Ball Mixed'
Callistephus chinensis 'Florette Champagne'
Callistephus chinensis 'Milady Mixed'
Callitriche hermaphroditica
Callitriche palustris
Callitris columellaris
Callitris endlicheri
Calluna vulgaris
Calluna vulgaris 'J H Hamilton'
Calocedrus decurrens
Calochortus 'Violet Queen'
Calochortus barbatus
Calochortus clavatus
Calochortus elegans
Calochortus gunnisonii
Calochortus luteus
Calochortus macrocarpus
Calochortus nuttallii
Calochortus nuttallii aureus
Calochortus pulchellus
Calochortus tolmiei
Calochortus uniflorus
Calochortus venustus
Caltha gracilis
Caltha leptosepala
Caltha leptosepala howellii
Caltha natans
Caltha palustris
Caltha palustris var Alba
Calycanthus floridus
Calycanthus floridus glaucus
Calycanthus occidentalis
Calypso bulbosa
Calystegia davurica
Calystegia hederacea
Calystegia japonica
Calystegia sepium
Calystegia soldanella
Calystegia subvolubilis
Camassia cusickii
Camassia cusickii 'Zwanenburg'
Camassia leichtlinii
Camassia leichtlinii 'Alba'
Camassia leichtlinii 'Blue Danube'
Camassia leichtlinii 'Caerula'
Camassia leichtlinii 'Semiplena'
Camassia quamash
Camassia quamash 'Blue Melody'
Camassia scilloides
Camelina sativa
Camellia biflora
Camellia chekiangoleosa
Camellia gracilis
Camellia japonica
Camellia japonica 'Nobilissima'
Camellia japonica 'R L Wheeler'
Camellia kissi
Camellia oleifera
Camellia pitardii
Camellia polyodonta
Camellia reticulata
Camellia sasanqua
Camellia semiserrata
Camellia sinensis
Camellia x williamsii
Camellia x williamsii 'Donation'
Camellia x williamsii 'J.C.Williams'
Camellia yunnanensis
Campanula 'Bussage Blue'
Campanula 'Rockery Mixed'
Campanula 'Rockery Mixed'
Campanula alliariifolia
Campanula carpatica
Campanula carpatica 'Blaue Clips'
Campanula carpatica 'Weisse Clips'
Campanula carpatica turbinata
Campanula cochleariifolia
Campanula edulis
Campanula fenestrellata
Campanula garganica
Campanula glomerata
Campanula isophylla 'Krystal Mixed'
Campanula lactiflora
Campanula lasiocarpa
Campanula latifolia
Campanula latiloba
Campanula medium
Campanula parryi
Campanula persicifolia
Campanula portenschlagiana
Campanula poscharskyana 'E H Frost'
Campanula poscharskyana 'Lisduggan variety'
Campanula punctata
Campanula punctata 'Pink Chimes
Campanula pyramidalis
Campanula rapunculoides
Campanula rapunculus
Campanula rotundifolia
Campanula takesimana
Campanula trachelium
Campanula versicolor
Camphorosma monspeliaca
Campsis grandiflora
Campsis radicans
Canarium album
Canna edulis
Canna glauca
Canna indica
Cannabis sativa
Capparis spinosa
Capsella bursa-pastoris
Capsicum annuum
Capsicum annuum 'Habenero'
Capsicum baccatum
Capsicum frutescens
Capsicum pubescens
Caragana arborescens
Caragana boisii
Caragana brevispina
Caragana decorticans
Caragana fruticosa
Caragana gerardiana
Caragana jubata
Caragana pygmaea
Caragana sinica
Cardamine amara
Cardamine amaraeformis
Cardamine bonariensis
Cardamine bulbifera
Cardamine bulbosa
Cardamine debilis
Cardamine fauriei
Cardamine flexuosa
Cardamine glacialis
Cardamine heptaphylla
Cardamine hirsuta
Cardamine impatiens
Cardamine kamarovi
Cardamine kitaibelii
Cardamine leucantha
Cardamine lyrata
Cardamine macrophylla
Cardamine nasturtioides
Cardamine nipponica
Cardamine oligosperma
Cardamine pennsylvanica
Cardamine pentaphyllos
Cardamine pratensis
Cardamine pratensis 'Flore Pleno'
Cardamine prorepens
Cardamine raphanifolia
Cardamine rotundifolia
Cardamine schinziana
Cardamine scutata
Cardamine trifolia
Cardamine yezoensis
Cardaria draba
Cardiocrinum cordatum
Cardiocrinum giganteum
Cardiospermum halicacabum
Carduus cernuus
Carduus crispus
Carduus nutans
Carex 'Silver Sceptre'
Carex acutiformis
Carex aquatilis
Carex arenaria
Carex brizoides
Carex buxbaumii
Carex conica
Carex conica 'Snowline'
Carex dispalata
Carex disticha
Carex elata
Carex hirta
Carex kobomugi
Carex macrocephala
Carex nebraskensis
Carex nubigena
Carex oshimenis 'Evergold'
Carex paniculata
Carex riparia
Carex rostrata
Carex utriculata
Carlina acanthifolia
Carlina acaulis
Carlina vulgaris
Carpanthea pomeridiana
Carpenteria californica
Carpesium abrotanoides
Carpesium divaricatum
Carpesium glossophyllum
Carpesium triste
Carpinus betulus
Carpinus betulus 'Fastigiata'
Carpinus caroliniana
Carpinus cordata
Carpinus laxiflora
Carpobrotus acinaciformis
Carpobrotus aequilaterus
Carpobrotus deliciosus
Carpobrotus edulis
Carpobrotus glaucescens
Carpobrotus modestus
Carpobrotus rossii
Carpobrotus virescens
Carthamnus lanatus
Carthamnus tinctorius
Carthamnus tinctorius 'Quadricolour'
Carum carvi
Carya aquatica
Carya buckleyi
Carya californica
Carya carolinae-septentrionalis
Carya cathayensis
Carya cordiformis
Carya floridana
Carya glabra
Carya glabra megacarpa
Carya illinoinensis
Carya laciniosa
Carya myristiciformis
Carya ovalis
Carya ovata
Carya pallida
Carya texana
Carya tomentosa
Carya x laneyi
Caryopteris clandonensis
Caryopteris clandonensis 'Heavenly Blue'
Caryopteris clandonensis 'Kew Blue'
Caryopteris clandonensis 'Worcester Gold'
Cassinia fulvida
Cassiope 'Edinburgh'
Cassiope 'muirhead'
Cassiope tetragona
Cassythia glabrella
Castanea alnifolia
Castanea crenata
Castanea dentata
Castanea henryi
Castanea mollissima
Castanea ozarkensis
Castanea pumila
Castanea pumila ashei
Castanea sativa
Castanea seguinii
Castanea species
Castanea x neglecta
Castanopsis cuspidata
Castanopsis delavayi
Castanopsis hystrix
Castanopsis orthacantha
Castanopsis sclerophylla
Castanopsis tibetana
Castanopsis tribuloides
Castanospermum australe
Castilleja linariaefolia
Casuarina cristata
Casuarina cunninghamiana
Casuarina glauca
Casuarina littoralis
Casuarina torulosa
Casuarina verticillata
Catabrosa aquatica
Catalpa bignonioides
Catalpa bignonioides 'Aurea'
Catalpa bungei
Catalpa ovata
Catalpa speciosa
Caucalis platycarpos
Caulanthus glaucus
Caulophyllum robustum
Caulophyllum thalictroides
Cavendishia alatum
Ceanothus 'Concha'
Ceanothus 'Italian Skies'
Ceanothus 'Puget Blue'
Ceanothus 'Southmead'
Ceanothus americanus
Ceanothus arboreus
Ceanothus arboreus 'Trewithen Blue'
Ceanothus cuneatus
Ceanothus divergens
Ceanothus fendleri
Ceanothus impressus
Ceanothus integerrimus
Ceanothus maritimus
Ceanothus ovatus
Ceanothus prostratus
Ceanothus purpureus
Ceanothus sanguineus
Ceanothus species
Ceanothus thyrsiflorus
Ceanothus velutinus
Cedronella canariensis
Cedrus atlantica
Cedrus deodara
Cedrus libani
Celastrus angulatus
Celastrus dependens
Celastrus flagellaris
Celastrus orbiculatus
Celastrus scandens
Celosia argentea cristata
Celosia argentea var. 'Century Mixed'
Celtis australis
Celtis boninensis
Celtis bungeana
Celtis caucasica
Celtis glycycarpa
Celtis jessoensis
Celtis koraiensis
Celtis laevigata
Celtis laveillei
Celtis lindheimeri
Celtis occidentalis
Celtis pallida
Celtis reticulata
Celtis sinensis
Celtis tenuifolia
Celtis tetrandra
Celtis tournefortii
Centaurea acaulis
Centaurea calcitrapa
Centaurea chamaerhaponticum
Centaurea cyanus
Centaurea cyanus 'Frosted Queen'
Centaurea cyanus nana 'Jubilee Gem'
Centaurea cynarus
Centaurea depressa
Centaurea iberica
Centaurea jacea
Centaurea melitensis
Centaurea monantha
Centaurea montana
Centaurea nigra
Centaurea raphanina
Centaurea scabiosa
Centaurea solstitialis
Centaurium erythraea
Centaurium spicatum
Centella asiatica
Centipeda minima
Centranthus macrosiphon
Centranthus ruber
Centranthus ruber duplicate
Centrosema virginianum
Cephalanthus occidentalis
Cephalaria syriaca
Cephalotaxus fortunei
Cephalotaxus harringtonia
Cephalotaxus harringtonia drupacea
Cephalotaxus harringtonia koreana
Cephalotaxus harringtonia nana
Cephalotaxus lanceolata
Cephalotaxus oliveri
Cephalotaxus sinensis
Cephalotaxus wilsoniana
Cerastium arvense
Cerastium fontanum
Cerastium furcatum
Cerastium holosteoides
Cerastium semidecandrum
Cerastium viscosum
Cerastium vulgatum hallaisanense
Ceratonia siliqua
Ceratophyllum demersum
Ceratostigma plumbaginoides
Ceratostigma willmottianum
Ceratostigma willmottianum 'Forest Blue'
Cercidiphyllum japonicum
Cercidiphyllum japonicum duplicate1
Cercidiphyllum japonicum duplicate2
Cercis canadensis
Cercis canadensis 'Forest Pansy'
Cercis chinensis
Cercis occidentalis
Cercis siliquastrum
Cercocarpus ledifolius
Cercocarpus montanus
Ceroxylon alpinum
Ceroxylon quindiuense
Ceroxylon utile
Cetraria islandica
Chaenactis douglasii
Chaenomeles cathayensis
Chaenomeles japonica
Chaenomeles speciosa
Chaenomeles speciosa 'Moerloosei'
Chaenomeles x superba
Chaenomeles x superba 'Crimson and Gold'
Chaerophyllum bulbosum
Chaerophyllum tuberosum
Chamaecrista fasciculata
Chamaecyparis lawsoniana
Chamaecyparis nootkatensis
Chamaecyparis thyoides
Chamaedaphne calyculata
Chamaelirium luteum
Chamaemelum nobile
Chamaerops humilis
Chamaesaracha coronopus
Chasmanthium latifolium
Cheilanthes pteridioides
Chelidonium majus
Chelone glabra
Chenopodium acuminatum
Chenopodium album
Chenopodium ambrosioides
Chenopodium ambrosioides anthelminticum
Chenopodium auricomum
Chenopodium berlandieri
Chenopodium bonus-henricus
Chenopodium botrys
Chenopodium bushianum
Chenopodium californicum
Chenopodium canihua
Chenopodium capitatum
Chenopodium cristatum
Chenopodium ficifolium
Chenopodium foliosum
Chenopodium fremontii
Chenopodium giganteum
Chenopodium gigantospermum
Chenopodium glaucum
Chenopodium graveolens
Chenopodium hybridum
Chenopodium incanum
Chenopodium leptophyllum
Chenopodium murale
Chenopodium nuttalliae
Chenopodium opulifolium
Chenopodium overi
Chenopodium pallidicaule
Chenopodium polyspermum
Chenopodium pratericola
Chenopodium quinoa
Chenopodium rubrum
Chenopodium schraderianum
Chenopodium stenophyllum
Chenopodium suecicum
Chenopodium urbicum
Chenopodium virgatum
Chenopodium viride
Chenopodium vulvaria
Chiliotrichum diffusum
Chilopsis linearis
Chimaphila maculata
Chimaphila umbellata
Chimonanthus praecox
Chimonobambusa marmorea
Chimonobambusa pachystachys
Chimonobambusa purpurea
Chimonobambusa quadrangularis
Chimonobambusa szechuanensis
Chionanthus virginicus
Chionodoxa forbesi
Chionodoxa luciliae
Chionodoxa luciliae 'Alba'
Chionodoxa luciliae 'Pink Giant'
Chionodoxa sardensis
Chionographis japonica
Chlorogalum parviflorum
Chlorogalum pomeridianum
Chlorophytum comosum variegatum
Choisya ternata
Choisya ternata 'Sundance'
Chondrilla chondrilloides
Chondrilla juncea
Chorispora sabulosa
Chorispora tenella
Chrozophora obliqua
Chrozophora tinctoria
Chrysanthemum carinatum
Chrysanthemum carinatum 'Summer Festival'
Chrysanthemum coronarium
Chrysanthemum coronarium spatiosum
Chrysanthemum indicum 'Charm Early Fashion Mixed'
Chrysanthemum marshallii
Chrysanthemum multicaule 'Moonlight'
Chrysanthemum segetum
Chrysolepis chrysophylla
Chrysolepis sempervirens
Chrysosplenium alternifolium
Chrysosplenium americanum
Chrysosplenium carnosum
Chrysosplenium oppositifolium
Chrysothamnus graveolens
Chrysothamnus nauseosus
Chrysothamnus viscidiflorus
Chusquea culeou
Cibotium barometz
Cicer arietinum
Cicer microphyllum
Cicerbita alpina
Cichorium endiva
Cichorium intybus
Cichorium spinosum
Ciclospermum leptophyllum
Cicuta virosa
Cimicifuga dahurica
Cimicifuga foetida
Cimicifuga heracleifolia
Cimicifuga racemosa
Cimicifuga simplex
Cineraria hybridus 'Dwarf British Beauty Mixed'
Cinna latifolia
Cinnamomum camphora
Circaea lutetiana
Cirsium acaulon
Cirsium amplexifolium
Cirsium arvense
Cirsium boreale
Cirsium brevicaule
Cirsium brevistylum
Cirsium buergeri
Cirsium chinense
Cirsium coreanum
Cirsium dipsacolepis
Cirsium eatoni
Cirsium edule
Cirsium eriophorum
Cirsium foliosum
Cirsium hookerianum
Cirsium japonicum
Cirsium japonicum ussuriense
Cirsium kamtschaticum
Cirsium laushanense
Cirsium lepskyle
Cirsium lineare
Cirsium maritimum
Cirsium nipponicum
Cirsium occidentale
Cirsium ochrocentrum
Cirsium oleraceum
Cirsium pallidum
Cirsium palustre
Cirsium pectinellum
Cirsium pendulum
Cirsium purpuratum
Cirsium schantarense
Cirsium scopulorum
Cirsium segetum
Cirsium serratuloides
Cirsium sieboldii
Cirsium spicatum
Cirsium spinosum
Cirsium suffultum
Cirsium tanakae
Cirsium tuberosum
Cirsium undulatum
Cirsium verutum
Cirsium virginianum
Cirsium vulgare
Cirsium weyrichii
Cirsium yezoense
Cistanthe grandiflora
Cistus 'Silver pink'
Cistus albidus
Cistus creticus
Cistus ladanifer
Cistus salviifolius
Cistus x argenteus 'Peggy Sammons'
Citrofortunella floridana
Citrofortunella microcarpa
Citrofortunella swinglei
Citroncirus
Citroncirus webberi
Citrullus lanatus
Citrus aurantifolia
Citrus aurantium
Citrus ichangensis
Citrus latifolia
Citrus latifolia 'Tahiti'
Citrus limon
Citrus reticulata
Citrus sinensis
Citrus x meyeri
Citrus x meyeri 'Meyer'
Citrus x paradisi
Cladium mariscus
Cladrastis lutea
Clarkia biloba
Clarkia bottae 'Amethyst Glow'
Clarkia elegans 'Apple Blossom'
Clarkia elegans 'Royal Bouquet Mixed'
Clarkia pulchella
Clarkia purpurea
Clarkia unguiculata
Claytonia acutifolia
Claytonia caroliniana
Claytonia lanceolata
Claytonia megarhiza
Claytonia perfoliata
Claytonia scammaniana
Claytonia sibirica
Claytonia tuberosa
Claytonia umbellata
Claytonia virginica
Clematis 'Bees Jubilee'
Clematis 'Betty Corning'
Clematis 'Bill MacKenzie'
Clematis 'Comtesse de Bouchard'
Clematis 'Early Sensation'
Clematis 'Etoile Voilette'
Clematis 'Gillian Blades'
Clematis 'Helsingborg'
Clematis 'Jackmanii Superba'
Clematis 'Lasurstern'
Clematis 'Little Nell'
Clematis 'Madame Julia Correvon'
Clematis 'Mary Rose'
Clematis 'Miss Bateman'
Clematis 'Mrs Cholmondeley'
Clematis 'Mrs N.Thompson'
Clematis 'Nelly Moser'
Clematis 'Perle d'Azur'
Clematis 'Polish Spirit'
Clematis 'Princess Diana'
Clematis 'Rouge Cardinal'
Clematis v. 'Alba Luxurians'
Clematis v. 'Purpurea Plena Elegans'
Clematis 'Ville de Lyon'
Clematis 'Vyvyan Pennell'
Clematis alpina 'Pink Flamingo'
Clematis apiifolia
Clematis armandii
Clematis armandii 'Apple Blossom'
Clematis brachyura
Clematis chinensis
Clematis cirrhosa 'Balearica'
Clematis cirrhosa 'Freckles'
Clematis cirrhosa 'Jingle Bells'
Clematis cirrhosa 'Wisley Cream'
Clematis columbiana
Clematis douglasii
Clematis flammula
Clematis florida
Clematis florida 'Flore Pleno'
Clematis florida 'Sieboldii'
Clematis heracleifolia
Clematis ianthina
Clematis ligusticifolia
Clematis macropetala
Clematis macropetala 'Markham's Pink'
Clematis microphylla
Clematis montana
Clematis montana grandiflora
Clematis montana var. rubens 'Elizabeth'
Clematis montana var. rubens 'Freda'
Clematis montana var. rubens 'Marjorie'
Clematis montana var. rubens 'Mayleen'
Clematis montana var. rubens 'Pink Perfection'
Clematis montana var. rubens 'Tetrarose'
Clematis orientalis
Clematis patens
Clematis pierotii
Clematis recta
Clematis rehderiana
Clematis serratifolia
Clematis tangutica
Clematis tangutica 'Radar Love'
Clematis terniflora
Clematis ternifolia
Clematis texensis
Clematis texensis 'Duchess of Albany'
Clematis texensis 'Etoille Rose'
Clematis texensis 'Gravetye Beauty'
Clematis tibetana
Clematis trichotoma
Clematis vitalba
Clematis viticella
Clematis viticella 'Abundance'
Clematis viticella 'Etoile Voilette'
Clematis x triternata
Clematis x triternata 'Rubromarginata'
Cleome gynandra
Cleome lutea
Cleome monophylla
Cleome ornithopodioides
Cleome serrulata
Cleome viscosa
Clerodendrum bungei
Clerodendrum cyrtophyllum
Clerodendrum japonicum
Clerodendrum kwangtungense
Clerodendrum thomsoniae
Clerodendrum trichotomum
Clethra alnifolia
Clethra arborea
Clethra Arborea duplicate
Clethra barbinervis
Cliftonia monophylla
Clinopodium chinense
Clinopodium umbrosum
Clinopodium vulgare
Clintonia borealis
Clintonia udensis
Clintonia umbellulata
Cneorum tricoccon
Cnicus benedictus
Cnidium japonicum
Cnidium monnieri
Cnidium officinale
Coccinia grandis
Cocculus orbiculatus
Cochlearia anglica
Cochlearia danica
Cochlearia globosa
Cochlearia macrocarpa
Cochlearia oblongifolia
Cochlearia officinalis
Cochlearia scotica
Cocos nucifera
Codonopsis javanica
Codonopsis lanceolata
Codonopsis nervosa
Codonopsis ovata
Codonopsis pilosula
Codonopsis tangshen
Codonopsis tubulosa
Codonopsis ussuriensis
Coelopleurum gmelini
Coelopleurum lucidum
Coffea arabica
Coffea canephora
Coffea excelsoides
Coffea liberica
Coix lacryma-jobi
Colchicum autumnale
Colchicum autumnale 'Album'
Colchicum autumnale 'Roseum Plenum'
Colchicum bivonae
Colchicum luteum
Colchicum speciosum
Colchicum speciosum 'Lilac Wonder'
Colchicum speciosum 'The Giant'
Colchicum speciosum 'Waterlily'
Coleus edulis
Colletia armata
Colletia ferox
Colletia paradoxa
Collinsia bicolor 'Surprise'
Collinsonia canadensis
Colocasia Esculenta
Coluria geoides
Colutea arborescens
Colutea istria
Colutea x media
Comandra pallida
Comandra richardsiana
Comandra umbellata
Commelina coelestis
Commelina communis
Commelina dianthifolia
Commelina elliptica
Commelina erecta
Commelina erecta angustifolia
Commelina tuberosa
Commelina virginica
Commersonia fraseri
Comptonia peregrina
Comptonia peregrina asplenifolia
Conandron ramondioides
Conanthera bifolia
Conanthera campanulata
Condalia hookeri
Coniogramme japonica
Conioselinum pacificum
Conioselinum univittatum
Conium maculatum
Conopodium majus
Conradina verticillata
Conringia orientalis
Consolida ajacis 'Frosted Skies'
Consolida ambigua
Consolida chinense 'Gentian Blue'
Consolida regalis
Convallaria keiskei
Convallaria majalis
Convallaria majalis 'Albostriata'
Convallaria majalis 'Fontin's Giant'
Convallaria majalis 'Prolificans'
Convallaria majalis 'Rosea'
Convallaria majalis 'Variegata'
Convolvulus arvensis
Convolvulus eneorum
Convolvulus erubescens
Convolvulus scammonia
Convolvulus tricolor
Conyza canadensis
Coprosma acerosa
Coprosma areolata
Coprosma atropurpurea
Coprosma billardieri
Coprosma brunnea
Coprosma foetidissima
Coprosma grandifolia
Coprosma hirtella
Coprosma lucida
Coprosma moorei
Coprosma nitida
Coprosma petriei
Coprosma propinqua
Coprosma pumila
Coprosma repens
Coprosma repens 'Copper Shine'
Coprosma rhamnoides
Coprosma robusta
Coprosma rotundifolia
Coprosma rugosa
Coprosma serrulata
Coprosma virescens
Coptis brachypetala
Coptis chinensis
Coptis deltoidea
Coptis japonica
Coptis occidentalis
Coptis teeta
Coptis teetoides
Coptis trifolia
Corallorhiza maculata
Corallorhiza odontorhiza
Corchorus capsularis
Corchorus olitorius
Cordyline australis
Cordyline australis 'Red Star'
Cordyline australis 'Sundance'
Cordyline indivisa
Cordyline stricta
Cordyline terminalis
Cordyline terminalis 'Rededge'
Cordyline terminalis tricolor
Corema album
Corema conradii
Coreopsis auriculata
Coreopsis calliopsidea
Coreopsis gigantea
Coreopsis tinctoria
Coreopsis tinctoria atkinsoniana
Coriandrum sativum
Coriaria microphylla
Coriaria myrtifolia
Coriaria nepalensis
Coriaria ruscifolia
Coriaria sarmentosa
Coriaria sinica
Coriaria terminalis
Cornus alba
Cornus alba 'Sibirica'
Cornus alternifolia
Cornus amomum
Cornus asperifolia drummondii
Cornus australis
Cornus canadensis
Cornus capitata
Cornus chinensis
Cornus controversa
Cornus controversa 'Variegata'
Cornus coreana
Cornus florida
Cornus hongkongensis
Cornus iberica
Cornus kousa
Cornus kousa chinensis
Cornus macrophylla
Cornus mas
Cornus monbeigii
Cornus nuttallii
Cornus occidentalis
Cornus officinalis
Cornus paucinervis
Cornus poliophylla
Cornus rugosa
Cornus sanguinea
Cornus sanguinea 'Midwinter Fire'
Cornus sericea
Cornus sessilis
Cornus stolonifera 'Flaviramea'
Cornus suecica
Cornus x unalaschkensis
Corokia x virgata
Coronilla emerus
Coronilla scorpioides
Coronilla varia
Coronopus didymus
Coronopus squamatus
Correa alba
Corrigiola littoralis
Cortaderia selloana
Cortaderia selloana duplicate
Corydalis ambigua
Corydalis aurea
Corydalis cava
Corydalis edulis
Corydalis falconeri
Corydalis govaniana
Corydalis incisa
Corydalis intermedia
Corydalis juncea
Corydalis ochotensis
Corydalis pallida
Corydalis solida
Corydalis ternata
Corydalis vaginans
Corydalis yanhusuo
Corylus americana
Corylus avellana
Corylus avellana 'Contorta'
Corylus avellana pontica
Corylus chinensis
Corylus colurna
Corylus cornuta
Corylus cornuta californica
Corylus fargesii
Corylus ferox
Corylus heterophylla
Corylus jacquemontii
Corylus maxima
Corylus sieboldiana
Corylus sieboldiana mandschurica
Corylus tibetica
Corylus x colurnoides
Corylus x vilmorinii
Corynocarpus laevigatus
Corypha elata
Cosmidium burridgeanum 'Phillipine'
Cosmos 'atrosanguineus'
Cosmos bipinnatus
Cotinus 'Grace'
Cotinus coggygria
Cotinus coggygria 'Golden Spirit'
Cotinus coggygria 'Royal Purple'
Cotinus obovatus
Cotoneaster acuminatus
Cotoneaster bacillaris
Cotoneaster conspicuus
Cotoneaster divaricatus
Cotoneaster franchetii
Cotoneaster frigidus
Cotoneaster glaucophyllus
Cotoneaster horizontalis
Cotoneaster lacteus
Cotoneaster microphyllus
Cotoneaster racemiflorus
Cotoneaster serotinus
Cotoneaster simonsii
Cotoneaster wardii
Cotoneaster x watereri
Cotula coronopifolia
Cousinia thomsoni
Cowania mexicana
Crambe abyssinica
Crambe cordifolia
Crambe kotschyana
Crambe maritima
Crambe orientalis
Crambe tatarica
Crataegomespilus dardarii
Crataegus acclivis
Crataegus aestivalis
Crataegus altaica
Crataegus anomala
Crataegus apiifolia
Crataegus aprica
Crataegus armena
Crataegus arnoldiana
Crataegus atrosanguinea
Crataegus azarolus
Crataegus baroussana
Crataegus caesa
Crataegus calpodendron
Crataegus canadensis
Crataegus canbyi
Crataegus champlainensis
Crataegus chlorosarca
Crataegus chrysocarpa
Crataegus coccinoides
Crataegus columbiana
Crataegus crus-galli
Crataegus cuneata
Crataegus dilatata
Crataegus dispessa
Crataegus douglasii
Crataegus durobrivensis
Crataegus ellwangeriana
Crataegus elongata
Crataegus festiva
Crataegus flabellata
Crataegus flava
Crataegus gemosa
Crataegus heterophylla
Crataegus holmesiana
Crataegus hupehensis
Crataegus illinoiensis
Crataegus intricata
Crataegus jackii
Crataegus jonesiae
Crataegus laciniata
Crataegus laevigata
Crataegus laevigata 'Crimson Cloud'
Crataegus laevigata 'Paul's Scarlet'
Crataegus laevigata 'Rosea Florea Pleno'
Crataegus lobulata
Crataegus macrosperma
Crataegus maximowiczii
Crataegus meyeri
Crataegus missouriensis
Crataegus mollis
Crataegus monogyna
Crataegus nigra
Crataegus opaca
Crataegus parvifolia
Crataegus pedicellata
Crataegus pedicellata gloriosa
Crataegus pensylvanica
Crataegus pentagyna
Crataegus phaenopyrum
Crataegus pinnatifida
Crataegus pinnatifida major
Crataegus pontica
Crataegus pringlei
Crataegus pruinosa
Crataegus pubescens
Crataegus pubescens stipulacea
Crataegus punctata
Crataegus reverchonii
Crataegus rivularis
Crataegus rotundifolia
Crataegus sanguinea
Crataegus schraderiana
Crataegus songorica
Crataegus species
Crataegus stipulosa
Crataegus submollis
Crataegus subvillosa
Crataegus succulenta
Crataegus szovitskii
Crataegus tanacetifolia
Crataegus uniflora
Crataegus x grignonensis
Crepis bursifolia
Crepis runcinata
Crepis sancta
Crepis tectorum
Crepis vesicaria
Crinum augustum
Crinum bulbispermum
Crinum flaccidum
Crinum powellii
Crinum powellii 'Album'
Crithmum maritimum
Crocosmia 'Zeal Giant'
Crocosmia aurea
Crocosmia crocosmiiflora
Crocosmia crocosmiiflora 'Carmin Brilliant'
Crocosmia crocosmiiflora 'Dusky Maiden'
Crocosmia crocosmiiflora 'Emberglow'
Crocosmia crocosmiiflora 'Emily McKenzie'
Crocosmia crocosmiiflora 'Jackanapes'
Crocosmia crocosmiiflora 'Jenny Bloom'
Crocosmia crocosmiiflora 'Lucifer'
Crocosmia crocosmiiflora 'Norwich Canary'
Crocosmia crocosmiiflora 'Solfatare'
Crocosmia crocosmiiflora 'Solfaterre'
Crocosmia crocosmiiflora 'Star of the East'
Crocosmia masoniorum
Crocus abantensis
Crocus ancyrensis
Crocus angustifolius
Crocus biflorus ssp. alexandrii 'Major'
Crocus biflorus ssp. weidenii 'Albus'
Crocus cancellatus
Crocus candidus var. subflavus
Crocus corsica
Crocus flavus ssp. flavus
Crocus fleischeri
Crocus imperati
Crocus imperati ssp. suaveolens 'Jager'
Crocus korolkowii
Crocus kotschyanus
Crocus malyi
Crocus minimus
Crocus nudiflorus
Crocus ochroleucus
Crocus sativus
Crocus serotinus
Crocus sieberi
Crocus sieberi 'Bowles White'
Crocus sieberi 'Hubert Edelston'
Crocus sieberi 'Violet Queen'
Crocus tommasinianus
Crocus tommasinianus 'Albus'
Crocus tommasinianus 'Barr's Purple'
Crocus tommasinianus 'Lilac Beauty'
Crocus tommasinianus 'Ruby Giant'
Crocus tommasinianus 'Whitwell Purple'
Crocus vernus
Crocus vernus Chrysanthus Hybrids
Crocus vernus Chrysanthus Hybrids 'Blue Bird'
Crocus vernus Chrysanthus Hybrids 'Blue Pearl'
Crocus vernus Chrysanthus Hybrids 'Cream Beauty'
Crocus vernus Chrysanthus Hybrids 'E.A. Bowles'
Crocus vernus Chrysanthus Hybrids 'Elegance'
Crocus vernus Chrysanthus Hybrids 'Ladykiller'
Crocus vernus Chrysanthus Hybrids 'Princess Beatrix'
Crocus vernus Chrysanthus Hybrids 'Snow Bunting'
Crocus vernus Dutch hybrids
Crocus vernus Dutch hybrids 'Flower Record'
Crocus vernus Dutch hybrids 'Golden Yellow'
Crocus vernus Dutch hybrids 'Jeane d'Arc'
Crocus vernus Dutch hybrids 'Joan of Arc'
Crocus vernus Dutch hybrids 'King of Striped'
Crocus vernus Dutch hybrids 'Mammoth Yellow'
Crocus vernus Dutch hybrids 'Pickwick'
Crocus vernus Dutch hybrids 'Remembrance'
Crocus vernus Dutch hybrids 'Vanguard'
Crocus vernus Dutch hybrids 'Yellow Mammoth'
Crocus vernus ssp. albiflorus
Crocus vernus ssp. vernus
Crocus vitellinus
Crotalaria sessiliflora
Cruciata laevipes
Cryptomeria japonica
Cryptotaenia canadensis
Cryptotaenia japonica
Cucubalus baccifer
Cucumis anguria
Cucumis melo
Cucumis melo 'Fastbreak'
Cucumis melo agrestis
Cucumis melo cantalupensis
Cucumis melo chito
Cucumis melo conomon
Cucumis melo flexuosus
Cucumis melo inodorus
Cucumis melo momordica
Cucumis metuliferus
Cucumis sativus
Cucumis sativus 'Aidas'
Cucumis sativus 'Burpless Tasty Green' F1 Hybrid
Cucurbita argyrosperma
Cucurbita ficifolia
Cucurbita foetidissima
Cucurbita maxima
Cucurbita moschata
Cucurbita pepo
Cucurbita pepo 'De Nice A Fruit Rond'
Cucurbita pepo 'Spineless Beauty'
Cudrania tricuspidata
Cuminum cyminum
Cunila origanoides
Cunninghamia lanceolata
Cuphea viscosissima
Cupressocyparis leylandii
Cupressus arizonica
Cupressus funebris
Cupressus macrocarpa
Cupressus sempervirens
Cupressus torulosa
Cuscuta chinensis
Cuscuta epythymum
Cuscuta europaea indica
Cuscuta japonica
Cuscuta megalocarpa
Cuscuta reflexa
Cuscuta umbellata
Cyananthus lobatus
Cyanella amboensis
Cyanella capensis
Cyanella hyacinthoides
Cyanella lutea
Cyanella orchidiformis
Cyathea dealbata
Cyathea medullaris
Cyathodes colensoi
Cyathodes fasciculata
Cyathodes fraseri
Cyathodes glauca
Cyathodes juniperina
Cyathodes oxycedrus
Cyathodes parviflora
Cyathodes straminea
Cycas circinalis
Cycas revoluta
Cyclamen coum
Cyclamen hederifolium
Cyclamen hederifolium 'album'
Cyclamen hederifolium 'General'
Cyclanthera brachystachya
Cyclanthera pedata
Cyclea hypoglauca
Cycloloma atriplicifolium
Cydonia oblonga
Cymbalaria muralis
Cymbonotus lawsonianus
Cymbopogon citratus
Cymopterus acaulis
Cymopterus bulbosus
Cymopterus fendleri
Cymopterus globosus
Cymopterus longipes
Cymopterus montanus
Cymopterus newberryi
Cymopterus purpurescens
Cymopterus purpureus
Cynanchum acutum
Cynanchum amplexicaule
Cynanchum arnottianum
Cynanchum atratum
Cynanchum caudatum
Cynanchum glaucescens
Cynanchum japonicum
Cynanchum paniculatum
Cynanchum sibiricum
Cynanchum stauntonii