willow-leaved dock —  Rumex salicifolius triangulivalvis {buckwheat family — Polygonaceae}
Flora of the Yukon Territory, Cody, p. 252a
(really it is R. sibiricus) { 1/50 sec, f11.0} – {airport, Whitehorse, Yukon} – {20/06/05 Monday, June 20, 2005; 3:58:53 PM}