United States, Minnesota, Anoka, Anoka County, Allison Savanna ... N1/2 of NE1/4 of Sec. 2, T 33N, R 23W. Collected in N central portion of tract;Helen Allison Savanna Scientific Natural Area;033N;23W;02
45.377702 -93.173879 +-800m. WGS84
on gentle S-facing slope, in well drained sandy soil. Also occurs in old field to the W. Assoc. here with Ambrosia artemisiifolia, Poa pratensis, Tradescantia occidentalis, Lepidium densiflorum.