| Calabrische den | Pinus brutia |
| Californische boompapaver | Romneya coulteri |
| Californische cipres | Chamaecyparis lawsoniana |
| Californische fuchsia | Zauschneria |
| Californische laurier | Umbellularia californica |
| Californische papaver | Romneya |
| Californische sequoia | Sequoia sempervirens |
| Californische sipres | Chamaecyparis lawsoniana |
| Californische torreya | Torreya californica |
| Californische zwarte eik | Quercus kelloggii |
| Camelia | Camellia |
| Canada-populier | Populus euramericana |
| Canadapopulier | Populus euramericana |
| Canadese akelei | Aquilegia canadensis |
| Canadese guldenroede | Solidago canadensis |
| Canadese kornoelje | Cornus sericea |
| Canadese mansoor | Asarum canadense |
| Canarische dadelpalm | Phoenix canariensis |
| Canarische eik | Quercus canariensis |
| Ceder | Cedrus |
| Ceder van goa | Cupressus lusitanica |
| Centaurie | Centaurea |
| Cheal's treurkers | Prunus 'Kiku-shidare-zakura' |
| Chileense peperboom | Drimys winteri |
| Chinees klokje | Forsythia |
| Chinees riet | Miscanthus |
| Chineesklokje | Forsythia |
| Chinese amberboom | Liquidambar formosana |
| Chinese anijsboom | Illicium anisatum |
| Chinese aralia | Aralia elata |
| Chinese balsempopulier | Populus simonii |
| Chinese beuk | Fagus engleriana |
| Chinese bieslook | Allium tuberosum |
| Chinese bruidssluier | Fallopia baldschuanica |
| Chinese cephalotaxus | Cephalotaxus fortunei |
| Chinese clematis | Clematis chinensis |
| Chinese dadel | Ziziphus jujuba |
| Chinese den | Pinus tabulaeformis |
| Chinese esdoorn | Acer tataricum ssp. ginnala |
| Chinese hemlock | Tsuga chinensis |
| Chinese hulst | Ilex |
| Chinese iep | Ulmus parvifolia |
| Chinese jeneverbes | Juniperus chinensis |
| Chinese kamperfoelie | Lonicera nitida |
| Chinese klokjesbloem | Platycodon grandiflorum |
| Chinese kuisheidsboom | Vitex negundo |
| Chinese kurkeik | Quercus variabilis |
| Chinese liguster | Ligustrum lucidum |
| Chinese magnolia | Magnolia delavayi |
| Chinese meidoorn | Crataegus pinnatifida |
| Chinese netelboom | Celtis sinensis |
| Chinese paardenkastanje | Aesculus chinensis |
| Chinese parasolboom | Firmiana simplex |
| Chinese pioen | Paeonia lactiflora |
| Chinese rode berk | Betula albosinensis |
| Chinese ruit | Thalictrum delavayi |
| Chinese sierappel | Malus spectabilis |
| Chinese stewartia | Stewartia sinensis |
| Chinese tamme kastanje | Castanea mollissima |
| Chinese treurwilg | Salix babylonica |
| Chinese tulpenboom | Liriodendron chinense |
| Chinese tupeloboom | Nyssa sinensis |
| Chinese vernisboom | Rhus potaninii |
| Chinese vleugelnoot | Pterocarya stenoptera |
| Chinese vlier | Sambucus tigranii |
| Chinese zelkova | Zelkova sinica |
| Chocoladeplant | Cosmos atrosanguinea |
| Chocoladewingerd | Akebia |
| Christoffelkruid | Actaea |
| Christusdoorn | Paliurus |
| Cider-eucalyptus | Eucalyptus gunnii |
| Cipres | Cupressus |
| Cipressenkruid | Santolina chamaecyparissus |
| Cipreswolfsmelk | Euphorbia cyparissus |
| Cistusroos | Cistus ladanifer |
| Citroenboom | Citrus |
| Citroengele honingklaver | Melilotus officinalis |
| Citroengomboom | Eucalyptus citriodora |
| Citroenkruid | Artemisia abrotanum |
| Citroenmelisse | Melissa officinalis |
| Citroentijm | Thymus citriodorus |
| Citroenverbena | Aloysia triphylla |
| Clifornische boompapaver | Romneya coulteri |
| Colorado-zilverspar | Abies concolor |
| Corsicaanse den | Pinus nigra laricio |
| Corsicaanse heide | Erica terminalis |
| Corsicaanse munt | Mentha requienii |
| Cranberry | Vaccinium macrocarpon |
| Curuba | Passiflora mollissima |
| Cypergras | Cyperus longus |
| Cypres | Cupressus |
| Cyprische aardbeiboom | Arbutus andrachne |
| Cyprische ceder | Cedrus libani brevifolia |