fine-leaved pondweed —  Potamogeton filiformis borealis {pondweed family — Potamogetonaceae}
Flora of the Yukon Territory, Cody, p. 056a
 { 1/60 sec, f10.0} – {Hidden lakes, Whitehorse, Yukon} – {16/08/08 Saturday, August 16, 2008; 3:29:54 PM}