-C-
| Plant | Origin | Zone | Height | Type | D/M/W |
| Caesalpinia cacalaco | |||||
| Caesalpinia ferrea - Brazilian Ironwood | East Brazil | 9-12 | 15M | Moist | |
| Caesalpinia granadillo - Bridal Veil Tree | Venezuela | 10-12 | 8M | Moist | |
| Caesalpinia peltoporoide - False Brazilwood | Brazil | 10M | Moist | ||
| Caesalpinia pucherrima - Dwarf Poinciana | West Indies, Tropical America | 10 | 5M | Tree | |
| Calamus areumis | |||||
| Calamus australis | Queensland | 25M | CV | ||
| Calamus caryotoides | |||||
| Calamus inermis | V | ||||
| Calamus spp - Rattan | 11 | 9m | V | ||
| Calamus vestitus - Guadal Canal Rattan Palm | Guadal Canal | 11-12 | V | ||
| Calamus viminalis | 11 | V | |||
| Calliandra haematocephala - Red Powder Puff | South America | 10-12 | 6M | B? / Bush | Moist |
| Calliandra surinamensis - Pink Powder Puff | North & South America | 9-12 | 6M | B? / Bush | |
| Callistemon viminalis - Red Cluster | Hybird | 9-12 | 6M | ||
| Callistemon viminalis - Weeping Bottlebrush | New South Wales | 9-12 | 8M | Moist | |
| Calophyllum brasiliense - Brazilian Beauty Leaf | West Indies, Central & South America | 10B-12 | 25M | Moist | |
| Calophyllum inophyllum - Mastwood | Tropical Asia to Pacific | 10-12M | 30M | Moist | |
| Calyptranthes pallens - Spicewood | South Florida | ||||
| Calyptrocalyx elegans v. boalak | |||||
| Calyptrocalyx hollrungii | New Guinea | 10B-11 | 2.5M | Clumping Palms | Moist |
| Calyptrocalyx pachystachys | New Guinea | 10B-11 | 3M | Shade | Moist |
| Calyptrocalyx polyphyllus | |||||
| Calyptrogyne ghiesbreghtiana | South Mexico - North Colombia | 10B-11 | 2M | Clumping Palms | |
| Calyptromoma occidentalis | Jamaica | 10B-11 | 15M | Shade | Moist |
| Calyptromoma rivalis | Hispaniola & Puerto Rico | 10B-11 | 15M | Shade | Moist |
| Campomansia linniatifolia | |||||
| Cananga ordorata - Perfume Tree / Ylang-Ylang | India - SE Asia -Austrailia | 10-12 | 20M | Moist | |
| Cananga spp - Black Ylang-Ylang | |||||
| Carcica papaya - Papaya | Columbia | 10-11 | 8M | ||
| Cardia - Glue Tree | |||||
| Carludovica palmata - Panama Hot Palm | Central & South America | 11 | 2-3 M | ||
| Carpentaria acuminata - Carpentaria Palm | No Territory AV | 10B-11 | 18M | Shade | |
| Carpoxylon macrospermum | Vanuatu | 11 | 30M | Shade | |
| Caryota cumingii - Golden Fishtail | Philippines | 10B-11 | 12m | Shade | |
| Caryota mitis - Clustering Fishtail Palm | Philippines-South China- SE Asia | 10B-11 | 8M | Clumping Palms | |
| Caryota oblusa - Mountain Fishtail | India, Thailand | 10B-11B | 20M | Shade | |
| Caryota rumphiana - Giant Fishtail | Southeast Asia, Australia | 10B-11 | 18m | Shade | |
| Caryota spp | Palm | ||||
| Caryota urens - Wine Palm | Burma, India, Sir Lankier | 10B-11 | 20M | Solitary Palm | Moist |
| Caryota urens 'Himalayan' | 10B-11 | 25M | Shade | ||
| Caryota zebrina | New Guinera | Palm | |||
| Casimiroa edulis - White Sapote (high elevators) | Mexico, Central America | 10-12 | 15M | Solitary Foliage | |
| Cassia alata | |||||
| Cassia fistula - Golden Shower | India | 12 | 20M | Tree | Moist |
| Cassia javanica - Apple Blossom Shower (rose pink) | Indonesia | 10-12 | 25M | Moist | |
| Cassia leptophylla | |||||
| Cassia sp. | |||||
| Cassia spectabilis | |||||
| Castanospermum australe - Moreton Bay Chestnut | Queenland | 10-12 | 40M | Tree | Moist |
| Cavanillesia platanifolia - Quipo | Panama, Columbia, Perry | 10-11 | 65M | Moist | |
| Cavinaia argyrata | |||||
| Cecropia hawaiian | |||||
| Cecropia palmata - Snakewood | West Indies, South America | 10-12 | 15M | Tree | Moist |
| Cecropia peltata - Guarumo | Tropical America | 10-12 | 20M | Tree | Moist |
| Cecropia Red form Costa Rica | |||||
| Cecropia sp. | Central America | ||||
| Cedrela odorata - Cigar Box Tree (greenish white) | Tropical America | 10-12 | 30M | Tree | Moist |
| Ceiba aesculifolia (yellow-white flowers) | Mexico-Central America | 10-12 | 25M | Tree | |
| Ceiba pentandra - Kapok Tree (white flowers) | Africa, Tropical America | 10-12 | 60M | Tree - Branching | |
| Ceiba schottii | Mexico |