United States, Minnesota, Stearns, On an eight-acre island in the Mississippi River one mile upstream from the State Highway 24 bridge at Clearwater.
45.4303127445 -94.0503168643
5031291N 417841E; T123N R27W sec26
285 meters
935 feet
Occasional on a broad gravel bar exposed by receding river levels. Moist, coarse, gravel and cobbles (mostly 0.5-2 inches in diameter), ~8-12 inches above the present water level. Full sun.
Associates include Cyperus erythrorhizos, C. bipartitus, C. squarrosus, C. strigosus, C. odoratus, C. engelmannii, Lipocarpha micrantha, Eragrostis hypnoides, E. frankii, Panicum philadelphicum, Mollugo verticillata, Persicaria lapathifolia, Lindernia dubia, Portulaca oleracea, Veronica catenata, Amaranthus tuberculatus, Chenopodium glaucum, Verbena bracteata, V. hastata, Rumex fueginus, Euphorbia maculata.