Reported as a new variety from the Green River Formation of Uintah and Duchesne counties, Utah, is Haplopappus armerioides (Nutt.) Gray var. gramineus Welsh & F. J. Smith.
Welsh, Stanley L. and Smith, Frank J.
"New Haplopappus variety in Utah (Compositae),"
Great Basin Naturalist: Vol. 43
, Article 5.
Available at: http://scholarsarchive.byu.edu/gbn/vol43/iss2/5