San Francisco Bay Area Plant Encyclopedia
- California Poppy – See Eschscholzia
- Calliandra californica
- Calliandra eriophylla
- Calliandra “Sierra Star”
- Callisia repens
- Callistemon citrinus “Jeffersii”
- Callistemon viminalis “Slim”
- Calothamnus villosus
- Calylophus drummondii
- Calystegia macrostegia
- Cambria Orchid
- Caralluma baldratii
- Caralluma europaea
- Caralluma luntii
- Caralluma socotrana
- Caralluma speciosa
- Carex “Blue Zinger”
- Carex “Bronzita”
- Carex “Cappuccino”
- Carex comans “Bronze”
- Carex “Kaga Nishiki”
- Carex “Milk Chocolate”
- Carex pansa
- Carex testacea
- Carex tumulicola
- Carnegiea gigantea
- Caryota mitis
- Cassia didymobotrya
- Casuarina glauca “Cousin It”
- Ceanothus “Anchor Bay”