Athyrium filix-femina var. cyclosorum (L.) Roth. Ex Mert.
United States, California, Butte, On the west side of the sharp bend in the South Fork of the Feather River, about _ mile north of the bridge across the river, about 3/4 mile north of Golden Trout Crossing, 3 miles (air) northwest of Sly Creek Reservoir Dam. T20N R07E S01 SW1/4
39.616667 -121.144444 +-805m. NAD83
T20N R07E S01 SW1/4; 39§ 37m N; 121§ 8m 40s W
Small size fronds, on wet light brown sandy soil, on gravel bars. Common. Yellow Pine Forest.