Scarlet Gilia, a native species, has been added to the USWildflowers database (04/21/2012.) Scientific name is Ipomopsis aggregata. Photo below was taken in Boise County, ID, on June 13, 2010. Go to the Scarlet Gilia detail page for more information.
Scarlet Gilia, Scarlet Skyrocket, Scarlet Trumpet, Skunk Flower – Ipomopsis aggregata