1.  purple avens(n = noun.plant) geum triflorum, prairie smoke - North American perennial with hairy basal pinnate leaves and purple flowers and plume-tipped fruits;
is a kind of avens

2.  purple avens(n = noun.plant) chocolate root, geum rivale, indian chocolate, water avens - erect perennial of north temperate zone having pinnate leaves and a few nodding flowers with a brown-purple calyx and orange and pink petals;
is a kind of avens

avens, banded purple, early purple orchid, late purple aster, mountain avens, order of the purple heart, purple, purple amaranth, purple anise, purple apricot, purple bacteria, purple beech, purple boneset, purple chinese houses, purple clematis, purple clover, purple cress, purple emperor, purple finch, purple fringeless orchid, purple fringeless orchis, purple gallinule, purple grackle, purple granadillo, purple ground cherry, purple heart, purple heather, purple loco, purple locoweed, purple loosestrife, purple martin, purple milk vetch, purple mullein, purple nightshade, purple onion, purple orchis, purple osier, purple passage, purple pea, purple poppy mallow, purple rock brake, purple sage, purple sanicle, purple saxifrage, purple silkweed, purple strawberry guava, purple trillium, purple velvet plant, purple virgin's bower, purple willow, red-spotted purple, reddish purple, retinal purple, royal purple, texas purple spike, tyrian purple, visual purple, water avens, white avens, wood avens, yellow avens