1. Mat-forming perennial found in cold springs of the eastern United States
   - American watercress, Cardamine rotundifolia

Type of: watercress

• Ronald George Wreyford Norrish
• Ronald Reagan
• Ronald Wilson Reagan
• rondavel
• rondeau
• rondel
• rondelet
• rondo
• rondure
• roneo
• Roneograph
• rongeur
• ronin
• roo
• rood
• rood screen
• rood-tree
• roof
• roof garden
• roof mushroom
• roof of the mouth
• roof peak
• roof rack
• roof rat
• roofed