United States, Minnesota, Benton, BENTON COUNTY ... Graham's Island in the Mississippi River at the State Hwy 15 bridge in Sartell/Sauk Rapids ...T36N R31W NE1/4 of SE1/4 of NW1/4 Sec.22 (small, irregular section) also SE1/4 of NE1/4 of NW1/4 Sec.22. 036N 31W 22
45.598931 -94.181749 +-800m. WGS84
On large sand bar on downstream end of the island. Substrate varies from silt to sand to gravel. Full sun. Associated species include Cyperus squarrosus, Eleocharis acicularis, E. intermedia, E. ovata, Eragrostis hypnoides, Lipocarpha micrantha, Panicum philadelphicum, Lindernia dubia, Ludwigia palustris, Polygonum lapathifolium, Gnaphalium uliginosum, Mollugo verticillata, Amaranthus tuberculatus, Plantago major.