United States, California, Butte, SE corner of Llano Seco, in a ditch crossing Seven Mile Lane ca. 0.25 mi N of Nelson West Rd. T20N R01E S31 NE1/4 of NW1/4
39.548333 -121.908333 +-402m. NAD83
T20N R01E S31 NE1/4 of NW1/4; 39§ 32m 54s N; 121§ 54m 30s W
30 meters
100ft.
Locally abundant in a marshy ditch. The glochidia on the microspore masses are septate. Freshwater Marsh.