trembling aspen —  Populus tremuloides {willow family — Salicaceae}
Flora of the Yukon Territory, Cody, p. 213a
 { 1/125 sec, f9.5} – {Paddys Pond/Ice Lake, Whitehorse, Yukon} – {04/06/03 Wednesday, June 4, 2003; 2:00:23 PM}