common yarrow, milfoil —  Achillea millefolium borealis {composite family — Asteraceae (Compositae)}
Flora of the Yukon Territory, Cody, p. 541a
 { 1/640 sec, f5.6} – {McIntyre Ck. college, Whitehorse, Yukon} – {13/08/09 Thursday, August 13, 2009; 3:19:32 PM}