United States, Michigan, Emmet, West end of gravel road to Waugoshance Point, Wilderness State Park, Lake Michigan; Leaves channelled, sub-terete; open areas, wet sand.
Calcareous marly sand, peaty humus in forested areas; Windswept sedge flats bounded by Thuja swamps, Picea; Spikes mostly black; common in colonies, in flower; herbage cord-like.