Stock photography, photos: Closed Prairie Smoke Flower Close-U Stock photos of Close-up of Prairie Smoke (Geum triflorum) flower before seed head has opened. Bluestem Prairie Scientific & Natural Area, Minnesota. Photograph: © Matthew Thalman Click for a larger image and more information Keywords associated with this stock photo: Erythrocoma triflora, flower, Geum triflorum, Old-mans-whiskers, perennial, plant, Prairie Smoke, Purple Avens, Rosaceae, Rose, close up, close-up, macro, America, Bluestem Prairie, Bluestem Prairie SNA, Minnesota, North America, Scientific & Natural Area, Scientific & Natural Areas, United States, United States of America, US, USA