San Francisco Bay Area Plant Encyclopedia
- Cissus quadrangularis
- Cissus tuberosa
- Cistus “Gordon Cooper”
- Cistus “Jester”
- Cistus x purpureus
- Cistus salvifolius
- Cistus “Silver Pink”
- Cistus x skanbergii
- Cistus “Sunset”
- Cleistocactus fieldianus
- Cleistocactus hyalacanthus
- Cleistocactus morawetzianus
- Cleistocactus parapetiensis
- Cleistocactus ritteri
- Cleistocactus samaipatanus
- Cleistocactus straussii
- Cleistocactus tupizensis
- Cleistocactus winteri
- Cleistocactus winteri ssp. colademononis
- Clianthus puniceus
- Clivia miniata
- Clusia orthoneura
- Clusia “Princess”
- Clusia rosea
- Coccinia trilobata
- Cochemiea setispina
- Coleocephalocereus aureus
- Coleonema “Compactum”
- Coleonema “Danny’s Gold”
- Coleonema “Monterey Rose”