shepherd's purse —  Capsella bursa-pastoris {mustard family — Brassicaceae (Cruciferae)}
Flora of the Yukon Territory, Cody, p. 330c
 { 1/60 sec, f7.1} – {Paddys Pond/Ice Lake, Whitehorse, Yukon} – {29/08/06 Tuesday, August 29, 2006; 1:34:53 PM}