Cabomba, Genus
Cabombaceae, Family
Cakile, Genus
Calamagrostis, Genus
Calammophila(X), Genus
Calendula, Genus
Calepina, Genus
Calla, Genus
Callitrichaceae, Family
– synoniem van Plantaginaceae, Family
Callitriche, Genus
Calluna, Genus
Caltha, Genus
Camelina, Genus
Campanula, Genus
Campanulaceae, Family
Cannabaceae, Family
Cannabis, Genus
Caprifoliaceae, Family
Capsella, Genus
Cardamine, Genus
Carduus, Genus
Carex, Genus
Carlina, Genus
Carpinus, Genus
Carthamus, Genus
Carum, Genus
Caryophyllaceae, Family
Caryophyllales, Order
Castanea, Genus
Catabrosa, Genus
Catalpa, Genus
Catapodium, Genus
Caucalis, Genus
Celastraceae, Family
Celastrales, Order
Centaurea, Genus
Centaurium, Genus
Centranthus, Genus
Centunculus, Genus
Cephalanthera, Genus
Cerastium, Genus
Ceratocapnos, Genus
Ceratochloa, Genus
Ceratophyllaceae, Family
Ceratophyllales, Order
Ceratophyllum, Genus
Chaenomeles, Genus
Chaenorhinum, Genus
Chaerophyllum, Genus
Chamaecyparis, Genus
Chamerion, Genus
Chelidonium, Genus
Chenopodiaceae, Family
– synoniem van Amaranthaceae, Family
Chenopodium, Genus
Chionodoxa, Genus
Chondrilla, Genus
Chrysosplenium, Genus
Cicendia, Genus
Cicer, Genus
Cichorium, Genus
Cicuta, Genus
Circaea, Genus
Cirsium, Genus
Cistaceae, Family
Citrullus, Genus
Cladium, Genus
Claytonia, Genus
Clematis, Genus
Clethra, Genus
Clethraceae, Family
Clinopodium, Genus
Clusiaceae, Family
– synoniem van Hypericaceae, Family
Cochlearia, Genus
Coincya, Genus
Colchicaceae, Family
Colchicum, Genus
Colutea, Genus
Comarum, Genus
Commelinaceae, Family
Commelinales, Order
Compositae, Family
– synoniem van Asteraceae, Family
Coniferales, Order
Conium, Genus
Conopodium, Genus
Conringia, Genus
Consolida, Genus
Convallaria, Genus
Convolvulaceae, Family
Convolvulus, Genus
Conyza, Genus
Corallorrhiza, Genus
Coriandrum, Genus
Corispermum, Genus
Cornaceae, Family
Cornales, Order
Cornus, Genus
Coronopus, Genus
Corrigiola, Genus
Corydalis, Genus
Corylus, Genus
Corynephorus, Genus
Cosmos, Genus
Cotoneaster, Genus
Cotula, Genus
Crambe, Genus
Crassula, Genus
Crassulaceae, Family
Crataegus, Genus
Crepis, Genus
Crithmum, Genus
Crocus, Genus
Crossosomatales, Order
Cruciata, Genus
Cruciferae, Family
– synoniem van Brassicaceae, Family
Cryptomeria, Genus
Cucumis, Genus
Cucurbita, Genus
Cucurbitaceae, Family
Cucurbitales, Order
Cuminum, Genus
Cupressaceae, Family
Cuscuta, Genus
Cuscutaceae, Family
– synoniem van Convolvulaceae, Family
Cymbalaria, Genus
Cynodon, Genus
Cynoglossum, Genus
Cynosurus, Genus
Cyperaceae, Family
Cyperus, Genus
Cyrtomium, Genus
Cystopteris, Genus
Cytisus, Genus