Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britt.
Annotated by Peter Lesica, Feb 2008.

Montana: Custer County: USRL Experimental Station; Pasture N. Elev. 2600 ft.
46° 16' 48.2" N, 105° 58' 11.49" W; T6N R43E S16 SW 1/4
Coordinate Source: Specimen Label.
TRS on label incorrect. Should read R46E. USRL exp. sta.(United States Range Livestock Experiment Station) is current day USDA-ARS Fort Keogh Livestock and Range Research Laboratory. When range is 46E, TRS lines up with "Custer N" Pasture of Fort Keogh (specimen is mapped to this)¶¶ Herbarium of the Forest Service, U.S. Department of Agriculture. MRC 3646 Phenology: Flowers.

E. J. Woolfolk W-64, Jun 30, 1937
MONTU, Accession: 137961