northern water-starwort —  Callitriche hermaphroditica {water starwort family — Callitrichaceae}
Flora of the Yukon Territory, Cody, p. 431b
 { 1/320 sec, f14.0} – {McIntyre Ck. college, Whitehorse, Yukon} – {14/08/10 Saturday, August 14, 2010; 2:38:52 PM}