United States, Minnesota, Otter Tail, Otter Tail County...Sonnenberg State Wildlife Management Area...1.5 miles north-northeast of Vergas...T137N R40W etc.;Sonnenberg Wildlife Management Area;137N;40W;18
46.656944 -95.803611 +-3036m.
rather strongly-rolling forested terrain ... on outer portions of poor fen, in five-acre basin. Saturated peat. Mostly in full sun. Assocated species include Calla palustris, Polygonum sagittatum, Cicuta bulbifera, Triadenum fraseri, Iris versicolor, Glyceria grandis, Carex lacustris, C. stricta, Dulichium arndinaceum.