1. Of or relating to the ectoderm
   - ectodermal

See also: ectoderm

• genus Rissa
• genus Rivina
• genus Rivulus
• genus Robinia
• genus Roccella
• genus Roccus
• genus Rodolia
• genus Romneya
• genus Roridula
• genus Rorippa
• genus Rosa
• genus Rosellinia
• genus Rosmarinus
• genus Roystonea
• genus Rubia
• genus Rubus
• genus Rudbeckia
• genus Rumex
• genus Rumohra
• genus Rupicapra
• genus Rupicola
• genus Ruptiliocarpon
• genus Ruscus
• genus Russula
• genus Ruta