Cephalanthera longifolia
Narrow-leaved Helleborine
Cephalanthera rubra
Red Helleborine
Cerastium arvense
Field Mouse-ear
Ceratocapnos claviculata
Climbing Corydalis
Cercis siliquastrum
Judas-tree
Cereus hexagonus
Lady of the Night Cactus
Cestrum nocturnum
Night-blooming Jessamine
Chamaecyparis obtusa
Japanese Cypress
Chamaecyparis pisifera
Sawara Cypress
Chamaenerion angustifolium
Chenopodium vulvaria
Stinking Goosefoot
Chloris barbata
Swollen Windmill-grass
Chlorophytum orchidastrum
Orange Spider Plant
Christia vespertilionis
Red Butterfly Wing
Chromolaena odorata
Devil Weed
Chrysanthemum indicum
Indian Chrysanthemum
Chrysophyllum cainito
Star Apple
Chrysosplenium alternifolium
Alternate-leaved Golden-saxifrage
Chrysosplenium oppositifolium
Opposite-leaved Golden-saxifrage
Chrysothemis pulchella
Sunset Bells
Cichorium intybus
Chicory
Circaea alpina
Alpine Enchanter's-nightshade
Circaea lutetiana
Enchanter's-nightshade
Circaea x intermedia
Upland Enchanter's-nightshade
Cirsium oleraceum
Cabbage Thistle
Cirsium palustre
Marsh Thistle
Cissus verticillata
Princess Vine
Clathrus archeri
Claytonia sibirica
Pink Purslane
Cleome rutidosperma
Fringed Spider Flower
Cleome spinosa
Spiny Spiderflower
Cleome viscosa
Asian Spiderflower
Clerodendron chinensis
Glory Bower
Clerodendron paniculatum
Pagoda Flower
Clerodendron quadriloculare
Starburst Bush
Clerodendron speciosissimum
Java Glory Bower
Clerodendron thompsoniae
Bleeding Glory-bower
Clinopodium vulgare
Wild Basil
Clitocybe olearia
Clitoria ternatea
Asian Pigeonwings
Cnidoscolus aconitifolius
Chaya
Coccinia grandis
Ivy Gourd
Cochlearia officinalis agg
Common Scurvygrass
Cocos nucifera
Coconut
Codiaenum variegatum
Fire Croton
Coffea arabica
Coffee
Coleus amboinicus
Cuban Oregano
Coleus decurrens
Coleus
Coleus scutellarioides
Coleus
Colobanthus quitensis
Antarctic pearlwort
Colobanthus quitensis and Deschampsia antarctica
Comarum palustre
Marsh Cinquefoil
Combretum indicum
Rangoon Creeper
Commelina benghalensis
Benghal Dayflower
Commelina diffusa
Climbing Dayflower
Commersonia bartramia
Conium maculatum
Hemlock
Conocarpus erectus
Buttonwood
Conocarpus lancifolius
Qalab
Convallaria majalis
Lily-of-the-valley
Coprinus comatus
Shaggy Inkcap
Coprinus picaceus
Magpie Inkcap
Corchorus aestuans
East Indian Jute Mallow
Corchorus olitorius
Jute Mallow
Cordyline fruticosa
Ti Plant
Coreopsis lanceolata
Lanceleaf Coreopsis
Corydalis solida
Bird-in-a-bush
Cosmos caudatus
King's Salad
Cosmos Sulphureus
Sulfur Cosmos
Costus dubius
Spiral Flag