Synonyms for Purple Avens (same or very similar meaning)
WordNet sense 1 (North American perennial with hairy basal pinnate leaves and purple flowers and plume-tipped fruits):
prairie smoke, Geum triflorum
WordNet sense 2 (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, chocolate root, Geum rivale, Indian chocolate
From the ODE community, based on WordNet
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