United States, Minnesota, Washington, Washington Co. Along Minn. Rt. 95, 3 mi N of its jnc with I-94. T29N R20W Sec.15 NE1/4.;Saint Croix Savanna Scientific Natural Area;029N;20W;15
44.999636 -92.791781 +-800m. WGS84
Sand and gravel ridge; full sun, prairie vegetation.