hare's-foot sedge —  Carex lachenalii {sedge family — Cyperaceae}
Flora of the Yukon Territory, Cody, p. 153a
It's in front of the saxifragia nelsonia { 1/125 sec, f8.0} – { , Mayo, Keno, Yukon} – {20/07/03 Sunday, July 20, 2003; 2:43:54 PM}