1. Resembling a cloud
   - nebular

See also: cloudy

• genus Calopogon
• genus Calosoma
• genus Caltha
• genus Calvatia
• genus Calycanthus
• genus Calycophyllum
• genus Calymmatobacterium
• genus Calypso
• genus Calystegia
• genus Camassia
• genus Cambarus
• genus Camelina
• genus Camellia
• genus Camelus
• genus Campanula
• genus Campephilus
• genus Camponotus
• genus Camptosorus
• genus Campyloneurum
• genus Campylorhynchus
• genus Canachites
• genus Cananga
• genus Canangium
• genus Canavalia
• genus Cancer