United States of America, Oregon, Malheur Co., Owyhee Uplands, Dry Creek basin, Sand Hollow Creek, upstream of confluence with Dry Creek, 30 air miles south-southwest of Vale
43.56606 -117.42234 NAD27
853 meters
2800 ft
In standing water in rocky channel; with Polypogon monspeliensis, Eleocharis palustris