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 • Syn: water avens, Indian chocolate, chocolate root, Geum rivale • Hypernyms: avens 2. North American perennial with hairy basal pinnate leaves and purple flowers and plume-tipped fruits • Syn: prairie smoke, Geum triflorum • Hypernyms: avens