Plants — C
- Caesalpinia pulcherrima Barbados flower-fence
- Cajanus cajan pigeonpea
- Cajanus scarabaeoides Showy Pigeonpea
- Calamus erectus tynriew
- Calea ternifolia
- Calendula Marigold
- Calendula arvensis Field Marigold
- Calendula officinalis calendula
- Calliandra angustifolia
- Calliandra humilis Dwarf Stick-Pea
- Callicarpa Beauty-berry
- Callicarpa arborea
- Callicarpa formosana
- Callicarpa kwangtungensis
- Callicarpa longifolia White-berried Malayan Lilac
- Callicarpa macrophylla Urn-fruit beauty-berry
- Callicarpa nudiflora
- Callichilia barteri
- Calluna vulgaris
- Calotropis gigantea Crown Milkweed
- Caltha palustris Cowflock
- Calycopteris floribunda
- Camellia sinensis tea
- Campanula parryi Parry's Bluebells
- Camphora parthenoxylon
- Campsis grandiflora Chinese trumpet creeper
- Camptotheca Happy Trees
- Cananga odorata Cananga tree
- Canarium album
- Canarium subulatum
- Canavalia ensiformis
- Canellaceae Wild Cinnamon
- Cannabis Cannabis tourism
- Cannabis indica
- Cannabis sativa Cannabis sata
- Canthium berberidifolium
- Capparis micracantha
- Capparis spinosa Caper
- Capsella Shepherd's-purses
- Capsella bursa-pastoris
- Capsicum annuum
- Capsicum annuum var. acuminatum cayenne pepper
- Capsicum frutescens ‘Siling Labuyo’ Siling labuyo
- Caragana sinica
- Carallia brachiata Carallia
- Carapichea ipecacuanha ipecac
- Cardamine pratensis
- Cardiospermum halicacabum Balloon vine
- Carduus crispus Curled Thistle
- Carex Sedge
- Carex brevicollis
- Carex delicata
- Carex humilis Dwarf Sedge
- Carex meyeriana Meyer’s sedge
- Carex pediformis Wide-leaf low sedge
- Carica papaya
- Carissa carandas Bengal-currants
- Carnegiea gigantea Giant Saguaro
- Carthamus tinctorius Dyer's-saffron
- Carum carvi Caraway
- Cascabela thevetia
- Casimiroa edulis White sapote
- Cassia
- Cassia bakeriana
- Cassia fistula Golden Rain
- Cassytha Devils Tresses
- Castanea sativa
- Catalpa Catalpas
- Catha edulis Khat
- Catharanthus Madagascar periwinkles
- Catharanthus roseus Billygoat Weed
- Catharanthus trichophyllus
- Cayaponia espelina
- Cayaponia tayuya
- Ceanothus americanus Jersey Tea
- Ceanothus fendleri
- Cedrus deodara Deodar
- Celastrus orbiculatus Asian Bittersweet
- Celastrus paniculatus Black oil tree
- Celosia cristata Crested Cock's Comb
- Celtis australis European Hackberry
- Celtis occidentalis
- Celtis sinensis Chinese hackberry
- Centaurea benedicta Bitter Thistle
- Centaurea cyanus Bachelor's Button
- Centaurium
- Centaurium erythraea Centaury
- Centaurium pulchellum Branched centaury
- Centella asiatica Asian Pennywort
- Centipeda minima Spreading Sneezeweed
- Ceratonia siliqua Carob
- Cerbera
- Cerbera manghas Madagascar ordeal-bean
- Cerbera odollam
- Cestrum diurnum
- Cetraria islandica Iceland Moss
- Chaerophyllum chervil
- Chamaemelum nobile Chamomile
- Chelidonium asiaticum Asian celandine
- Chelidonium majus Celandine
- Chenopodium vulvaria Fish Guts Plant
- Chilopoda centipede
- Chimaphila maculata
- Chimaphila umbellata umbellate wintergreen
- Chionanthus retusus
- Chloranthus erectus
- Chloranthus henryi
- Chloranthus japonicus
- Chloranthus spicatus chulantree
- Chlorophytum borivilianum safed musli
- Chosenia arbutifolia
- Christella dentata
- Chromolaena odorata Bitter bush
- Chrysanthemum chrysanthemums
- Chrysanthemum indicum Indian Chrysanthemum
- Chrysanthemum morifolium
- Chrysophyllum cainito Star Apple
- Chrysopogon zizanioides False beardgrass
- Chrysosplenium alternifolium Alternate-Leaved Golden-Saxifrage
- Cibotium Manfern
- Cibotium barometz Lamb of Tartary
- Cicer arietinum Bengal Gram
- Cichorium intybus Chicory
- Cinchona Cinchona Bark
- Cinchona calisaya Chinabark
- Cinchona officinalis Lojabark
- Cinchona pubescens
- Cinnamomum bejolghota
- Cinnamomum camphora Camphortree
- Cinnamomum cassia
- Cinnamomum malabatrum
- Cinnamomum parthenoxylon Selasian Wood
- Cinnamomum verum Ceylon Cinnamon
- Cipura campanulata
- Circaea lutetiana Broadleaf Enchanter's Nightshade
- Cirsium arvense var. integrifolium
- Cirsium japonicum var. maackii Ussuri thistle
- Cirsium kawakamii
- Cissampelos pareira
- Cissus Treebind
- Cissus quadrangularis Finger Cactus
- Cissus repanda
- Cissus verticillata Possum grape
- Cistanche deserticola desert-broomrape
- Citrullus colocynthis Colocynth
- Citrullus lanatus watermelon
- Citrus ×aurantifolia Citrus × aurantiifolia
- Citrus × aurantium Bitter orange
- Citrus ×bergamia bergamot orange
- Citrus hystrix Celebes papeda
- Citrus imonimedica Florentine citron
- Citrus ×junos yuzu
- Citrus × limon Lemon
- Citrus maxima pomelo
- Citrus medica Citron
- Citrus medica var. ethrog Etrog
- Citrus reticulata Mandarin Orange
- Citrus ×sinensis Sweet orange
- Citrus suavissima
- Citrus trifoliata Chinese bitter orange
- Citrus unshiu Satsuma mandarin
- Cladogynos orientalis
- Clausena lansium wampee
- Clematis alpina Alpine Clematis
- Clematis armandi Evergreen Clematis
- Clematis chinensis
- Clematis hexapetala
- Clematis terniflora var. mandshurica
- Clematis vitalba
- Cleome viscosa Asian spiderflower
- Clerodendrum chinense Chinese Glorybower
- Clerodendrum glandulosum
- Clerodendrum infortunatum
- Clerodendrum paniculatum Pagoda Flower
- Clerodendrum petasites
- Clerodendrum phlomidis Sage glorybower
- Clinacanthus nutans Sabah Snake Grass
- Clinopodium grandiflorum Greater Calamint
- Clitoria ternatea Asian Pigeonwings
- Clivia miniata
- Cnidium snowparsley
- Coccinia grandis
- Cochlospermum angolense
- Cochlospermum regium
- Cochlospermum vitifolium Buttercup Tree
- Cocos nucifera Coconut
- Codonopsis Bonnet Bellflower
- Codonopsis lanceolata Deodeok (Lance Asiabell, Bonnet bellflower)
- Codonopsis macrocalyx
- Codonopsis pilosula Pilose bellflower
- Codonopsis pilosula subsp. tangshen
- Coffea arabica Arabian coffee
- Coix Job's Tears
- Coix lacryma-jobi Adlay
- Coix lacryma-jobi var. ma-yuen Coix millet
- Cola Kola Trees
- Colchicum Men-in-a-Boat
- Colchicum autumnale Autumn Crocus
- Colchicum speciosum Giant Meadow Saffron
- Colchicum variegatum
- Colocasia esculenta Arum-Lily Potatoes
- Comarum palustre Marsh Cinquefoil
- Combretum Combretums
- Combretum fruticosum
- Combretum indicum
- Combretum trifoliatum
- Commelina benghalensis Benghal Dayflower
- Commiphora Myrrh
- Commiphora caudata hill-mango
- Commiphora myrrha African myrrh
- Commiphora wightii Indian bdellium-tree
- Congea tomentosa Lluvia De Orquideas
- Conioselinum anthriscoides Sichuan lovage
- Conium maculatum Carrot-fern
- Convallaria keiskei Asian Lily-of-the-Valley
- Convallaria majalis European Lily Of The Valley
- Convolvulus Bindweed
- Convolvulus arvensis
- Convolvulus prostratus
- Convolvulus scammonia scammony
- Conyza ramosissima
- Coptis chinensis Chinese goldthread
- Coptis deltoidea
- Coptis japonica
- Coptis omeiensis
- Cordia dichotoma Clammy Cherry
- Cordia myxa Assyrian Plum
- Cordyceps militaris Scarlet Caterpillar Fungus
- Coreopsis tinctoria Plains coreopsis
- Coriandrum sativum Coriander
- Coriaria intermedia
- Coriaria myrtifolia
- Cornus florida
- Cornus officinalis Asiatic dogwood
- Corydalis Corydalises
- Corydalis ambigua Small corydalis
- Corydalis aurea
- Corydalis bungeana Bunge’s corydalis
- Corydalis pumila
- Corydalis yanhusuo Yan Hu Suo
- Corylus avellana Barcelona-nuts
- Corylus heterophylla Asian hazel
- Corynanthe johimbe Yohimbe
- Corypha lecomtei Traing
- Coryphantha compacta
- Coscinium fenestratum Yellow Vine
- Cota tinctoria Dyer's Chamomile
- Cotylelobium lanceolatum
- Couroupita guianensis Cannonball Tree
- Crassocephalum
- Crataegus
- Crataegus altaica
- Crataegus chlorosarca
- Crataegus cuneata Chinese hawthorn
- Crataegus dahurica
- Crataegus kansuensis
- Crataegus laevigata
- Crataegus maximowiczii Maximowicz’s hawthorn
- Crataegus monogyna hawthorn
- Crataegus pinnatifida Chinese haw
- Crataegus sanguinea
- Crateva nurvala
- Cratoxylum cochinchinense Red Memphat
- Cratoxylum formosum Pink Mempat
- Crescentia cujete Calabash Tree
- Crinum asiaticum Asiatic poisonbulb
- Crinum latifolium Pink Striped Trumpet Lily
- Crinum macowanii Cape Coast Lily
- Crocus sativus Italian Crocus
- Croton Croton (plant)
- Croton hancei Hance's Croton
- Croton setiger dove weed
- Croton tiglium Purging Croton
- Cruciata laevipes Crosswort
- Cryptantha crassisepala Thick-sepaled Cryptanth
- Cryptolepis dubia
- Cryptostegia grandiflora
- Cucumis prophetarum Cucumis
- Cucumis sativus
- Cucumis sativus var. xishuangbannanensis
- Cucurbita pepo Acorn squash
- Cullen corylifolium Blackdot
- Cuminum cyminum
- Curculigo orchioides Golden-eyed Grass
- Curcuma Hidden-Lily
- Curcuma aeruginosa
- Curcuma angustifolia East Indian arrowroot
- Curcuma aromatica Aromatic Tumeric
- Curcuma longa turmeric
- Curcuma petiolata hidden lily
- Curcuma prakasha
- Curcuma zanthorrhiza
- Curcuma zedoaria Zedoary
- Cuscuta Dodder
- Cuscuta chinensis Chinese dodder
- Cycas beddomei Beddome’s Cycas
- Cycas revoluta
- Cyclamen
- Cyclocybe aegerita
- Cyclosorus interruptus
- Cydonia oblonga
- Cymbopogon Lemon Grass
- Cymbopogon citratus Lemon Grass
- Cymbopogon flexuosus
- Cynanchum acidum
- Cynanchum bungei
- Cynanchum glaucescens
- Cynanchum paniculatum
- Cynanchum stauntonii
- Cynanchum versicolor
- Cynanchum viminale
- Cynara cardunculus Cardoon
- Cynodon dactylon Cynodon dytahilo
- Cynoglossum officinale Common Houndstongue
- Cynoglossum virginianum Andersonglossum virginianum
- Cynometra iripa wrinkle pod mangrove
- Cynomorium songaricum
- Cyperus alternifolius Umbrella sedge, Umbrella papyrus, Umbrella palm, Umbrella plant, Umbrella grass
- Cyperus papyrus Egyptian paperplant
- Cyperus rotundus Common Nut Sedge
- Cyperus scariosus cypriol
- Cypripedium calceolus
- Cypripedium franchetii
- Cypripedium henryi Henry's Cypripedium
- Cypripedium japonicum Japanese Ladyslipper
- Cypripedium macranthos Big-flower lady’s slipper
- Cypripedium reginae showy lady slipper
- Cypripedium tibeticum Tibetan Cypripedium
- Cytinus
- Cytisus oromediterraneus Pyrenean broom