Common Fiddleneck, a native species, has been added to the USWildflowers database (08/24/2010.)  Scientific name is Amsinckia menziesii.  This plant also is known by the common names  Menzie’s Fiddleneck and Rancher’s Fiddleneck.  Photo below was taken in the Boise Foothills of Ada County, Idaho on June 7, 2010.

Common Fiddleneck, Menzie's Fiddleneck, Rancher's Fiddleneck - Amsinckia menziesii