wood horsetail, woodland horsetail —  Equisetum sylvaticum {horsetail family — Equisetaceae}
Flora of the Yukon Territory, Cody, p. 030c
 { 1/125 sec, f11.0} – {Dam area, Whitehorse, Yukon} – {02/09/07 Sunday, September 2, 2007; 2:34:28 PM}