1. Large tree of Australasia
   - red beech, brown oak, booyong, crow's foot, stave wood, silky elm, Heritiera trifoliolata

Type of: angiospermous tree, flowering tree

• genus Callithrix
• genus Callitriche
• genus Callitris
• genus Callophis
• genus Callorhinus
• genus Calluna
• genus Calocarpum
• genus Calocedrus
• genus Calochortus
• genus Calophyllum
• 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