common pepper-grass —  Lepidium densiflorum elongatum {mustard family — Brassicaceae (Cruciferae)}
Flora of the Yukon Territory, Cody, p. 352c
 { 1/125 sec, f5.6} – {Paddys Pond/Ice Lake, Whitehorse, Yukon} – {09/08/06 Wednesday, August 9, 2006; 2:06:09 PM}