U.S.A., Colorado, Boulder, West base of Steamboat Mountain, foothills of Front Range 2 miles N. W. of Lyons.
1900 meters
1900 m.
On thin soil over sandstone ledges, often in shade of small shrubs, talus slopes. Associated with Toninia tristis Th. Fr., Dermatocarpon hepaticum (Ach.) Th. Fr. and Grimmia calyptrate Hook.