fine-leaved pondweed —  Potamogeton filiformis borealis {pondweed family — Potamogetonaceae}
Flora of the Yukon Territory, Cody, p. 056a
 { 1/15 sec, f10.0} – {Hidden lakes, Whitehorse, Yukon} – {15/08/08 Friday, August 15, 2008; 3:19:18 PM}