scouring rush —  Equisetum hyemale affine {horsetail family — Equisetaceae}
Flora of the Yukon Territory, Cody, p. 029a
 { 1/20 sec, f9.0} – {Hidden lakes, Whitehorse, Yukon} – {23/08/08 Saturday, August 23, 2008; 2:34:05 PM}