water horsetail —  Equisetum fluviatile {horsetail family — Equisetaceae}
Flora of the Yukon Territory, Cody, p. 028b
 { 1/30 sec, f10.0} – {McIntyre Ck. Copper Haul, Whitehorse, Yukon} – {14/09/07 Friday, September 14, 2007; 3:11:09 PM}