1. Erect perennial of north temperate zone having pinnate leaves and a few nodding flowers with a brown-purple calyx and orange and pink petals
   - water avens, purple avens, chocolate root, Geum rivale

Type of: avens

• ointment
• Oireachtas
• OIS
• Ojibwa
• Ojibway
• Ojos del Salado
• ok
• oka
• okapi
• Okapia
• Okapia johnstoni
• okay
• Okeechobee
• Okeechobee Waterway
• Okefenokee Swamp
• okeh
• Oken
• Okenfuss
• okey
• okey-doke
• okey-dokey
• Okinawa
• Okinawa campaign
• Oklahoma
• Oklahoma City