common mare's-tail —  Hippuris vulgaris {mare's-tail family — Hippuridaceae}
Flora of the Yukon Territory, Cody, p. 447a
(They're in the water) { 1/10 sec, f4.0} – {Salt Flats, Alaska Hwy, Yukon} – {23/08/07 Thursday, August 23, 2007; 9:02:05 PM}