Yellow Salsify, a non-native and potentially invasive species, has been added to the USWildflowers database (09/28/2010.)  Scientific name is Tragopogon dubius.  It’s also known by the common names Yellow Goatsbeard, Western Salsify, and Wild Oysterplant.  Photo below was taken in the Boise Foothills near Boise, ID on June 19, 2010.

Yellow Salsify, Yellow Goatsbeard, Western Salsify, Wild Oysterplant - Tragopogon dubius