1. A Japanese shrub that resembles members of the genus Spiraea; widely cultivated in many varieties for its dense panicles of flowers in many colours; often forced by florists for Easter blooming
   - spirea, spiraea

Type of: astilbe

• genus Clathrus
• genus Claviceps
• genus Claytonia
• genus Cleistes
• genus Clematis
• genus Cleome
• genus Clethra
• genus Clethrionomys
• genus Clianthus
• genus Cliftonia
• genus Clinopodium
• genus Clintonia
• genus Clitocybe
• genus Clitoria
• genus Clostridium
• genus Clupea
• genus Clusia
• genus Cnemidophorus
• genus Cnicus
• genus Cnidoscolus
• genus Coccothraustes
• genus Cocculus
• genus Coccus
• genus Coccyzus
• genus Cochlearia