United States, Alabama, Marshall, On hwy 79 at Marshall Co Park near Claysville, west shore of Lake Guntersville; W1/2 Sec 36, T7S R3E [Location ID: 13402]
34.38 -86.27 unknown
34 23 7 N, 86 16 30 W
2
Common in dense stand of Ludwigia with Spirodela and Azolla.