grey alder, hoary alder —  Alnus incana tenuifolia {birch family — Betulaceae}
Flora of the Yukon Territory, Cody, p. 237a
 { 1/160 sec, f11.0} – {Millennium trail, Whitehorse, Yukon} – {13/09/07 Thursday, September 13, 2007; 1:27:34 PM}