United States, Minnesota, Big Stone, Collection located ca. 8 km north-northwest of Ortonville, MN, on the northeast portion of Big Stone State Park.
45.27 -96.44
T121N R46W sec21
982 meters (3221ft)
Plants growing through out area of groundwater seepage. Collection was growing next to a small (ca 5 sq. m) area of open marly pools with abundant Triglochin sp. In deep peat soils. Water in pools measured ph. 7.38 with probe.