Large-flowered Triplet-lily, a native species, has been added to the USWildflowers database.  Scientific name is Triteleia grandiflora.  This plant also also goes by the common names Douglas’s Triteleia and Douglas’s brodiaea, since it was originally collected by David Douglas and classified in the genus Brodiaea.  Photo below was taken Boise National Forest near Boise, Idaho on 06/09/2010.

Large-flowered Triplet-lily - Triteleia grandiflora