United States, Colorado, Jefferson, Plants of Jefferson County Open Space. Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. High plains above Rocky Flats, west 1.7 mi. on CO Hwy 72 from CO Hwy 93, generally north 1.0 mi. on Plainview Road, then 400 m. east to a small break in slope, 19.6 km. north northeast of the GNIS location of Golden. 39.887532089°N, -105.257992493°W WGS 1984, Elev. 1928 m. Few rhizomes, glume with offset mucro. Between two thickets of <i>Prunus virginiana</i> on the same break in slope. Collected nearby: <i>Lithospermum occidentale</i>; observed nearby: <i>Toxicodendron rydbergii</i>. Collected by permit: Jefferson County Open Space, 2019, issued 1 March 2019 to T. Schweich.