| Catmint, Catnip (many) |
Nepeta |
 |
| Catmint |
Nepeta x faassenii (mussinii) |
 |
| Catmint |
Nepeta nervosa |
 |
| Catmint |
Nepeta subsessilis |
|
| Catmint |
Nepeta tuberosa |
|
| Catmint, Catnip |
Nepeta clarkei |
|
| Cat's Claw |
Macfadyena unguis-cati |
|
| Caucasian Cranesbill |
Geranium ibericum |
 |
| Centaury |
Centaurium chloodes |
|
| Centaury |
Centaurium scilloides |
|
| Chalta |
Dillenia indica |
 |
| Chapico |
Desfontainia spinosa |
|
| Chasmanthe |
Chasmanthe floribunda |
|
| Chaste Tree |
Vitex agnus-castus |
|
| Chatham Is Forget-me-Not |
Myosotidium hortensia |
|
| Chenille Plant |
Acalypha hispida |
|
| Cherimoya |
Annona cherimola |
|
| Cherry Jubilee |
Allamanda violacea |
|
| Cherry Pie Plant |
Heliotropium |
|
| Chicory |
Cichorium intybus |
|
| Chilean Bell Flower |
Lapageria rosea |
|
| Chilean Bellflower |
Nolana humifusa |
|
| Chilean Fire Bush |
Embothrium coccineum |
|
| Chilean Glory Flower (many) |
Eccremocarpus |
|
| Chilean Glory Flower |
Eccremocarpus scaber |
|
| Chilean Jasmine |
Mandevilla laxa |
|
| Chilean Mitre Flower |
Mitraria coccinea |
|
| Chilean Puya |
Puya chilensis |
|
| Chinese Allspice |
Sinocalycanthus chinensis |
|
| Chinese Anise |
Illicium anisatum |
|
| Chinese Aster |
Callistephus chinensis |
|
| Chinese Box |
Murraya exotica |
|
| Chinese Forget-me-Not |
Cynoglossum amabile |
|
| Chinese Hibiscus |
Hibiscus rosa-sinensis |
|
| Chinese Jack-in-the-Pulpit |
Arisaema consanguineum |
|
| Chinese Lantern |
Physalis alkekengi v franchettii |
 |
| Chinese Peony |
Paeonia veitchii woodwardii |
|
| Chinese Persimmon |
Diospiros kaki |
|
| Chinese Tallow Tree |
Triadica sebiferum |
|
| Chinese Tree Peony |
Paeonia delavayi angustiloba |
|
| Chinese Wax Plant |
Sinocalycanthus chinensis |
|
| Chinese Wisteria |
Wisteria chinensis |
|
| Chinese Yellow Banana |
Musa lasiocarpa |
|
| Chives |
Allium schoenoprasum |
|
| Chocolate Vine |
Akebia quinata |
|
| Christmas Rose |
Helleborus niger |
|
| Chrysanthemum (many) |
Chrysanthemum |
|
| Chusan Palm |
Trachycarpus fortunei |
|
| Cineraria |
Pericallis x hybrida |
|
| Cinquefoil (many) |
Potentilla |
|
| Cinquefoil |
Potentilla fragariiformis |
|
| Cinquefoil Geranium |
Geranium potentilloides |
|
| Clammy Cuphea |
Cuphea viscosissima |
|
| Clary |
Salvia sclarea |
|
| Clematis (many) |
Clematis |
|
| Clematis |
Clematis macropetala |
|
| Climbing Daisy (many) |
Mutisia |
|
| Climbing Daisy |
Mutisia decurrens |
|
| Climbing Fumitory |
Adlumia fungosa |
|
| Climbing Lily |
Littonia modesta |
|
| Climbing Monkshood |
Aconitum episcopale |
|
| Climbing Snapdragon |
Maurendella antirrhiniflora |
|
| Clustered Bellflower |
Campanula glomerata |
|
| Cockscomb |
Celosia plumosa (argentea) |
|
| Cockscomb |
Celosia spicata |
|
| Codonopsis |
Codonopsis |
|
