thoroughwax —  Bupleurum americanum {parsley family — Apiaceae (Umbelliferae)}
Flora of the Yukon Territory, Cody, p. 451a
 { 1/320 sec, f7.1} – { , Klondike Hwy, North, Yukon} – {24/07/07 Tuesday, July 24, 2007; 4:23:24 PM}