sparrow's egg lady's slipper —  Cypripedium passerinum {orchid family — Orchidaceae}
Flora of the Yukon Territory, Cody, p. 206c
 { 1/40 sec, f18.0} – {McIntyre Ck. college, Whitehorse, Yukon} – {14/06/10 Monday, June 14, 2010; 2:32:06 PM}