American winter cress, American yellowrocket —  Barbarea orthoceras {mustard family — Brassicaceae (Cruciferae)}
Flora of the Yukon Territory, Cody, p. 328b
 { 1/200 sec, f7.1} – { , Tombstone Territorial Park, Yukon} – {25/06/10 Friday, June 25, 2010; 7:09:51 PM}