field horsetail —  Equisetum arvense {horsetail family — Equisetaceae}
Flora of the Yukon Territory, Cody, p. 028a
 { 1/30 sec, f22.0} – {McIntyre Ck. college, Whitehorse, Yukon} – {11/08/09 Tuesday, August 11, 2009; 3:31:48 PM}