Holboell's Rockcress, second rockcress —  Arabis holboellii retrofracta {mustard family — Brassicaceae (Cruciferae)}
Flora of the Yukon Territory, Cody, p. 325a
 { 1/200 sec, f4.0} – {Paddys Pond/Ice Lake, Whitehorse, Yukon} – {23/06/05 Thursday, June 23, 2005; 2:59:00 PM}