- Clay Twp. Harsens Is.1
- Clay Twp. Harsens Island, Channel Dr., near golf course.1
- Clyde Twp.; T7N, R16E, Sec. 41
- Contact UM Herbarium1
- Downtown st. Clair, Diamond Crystal Salt Co. plant along St. Clair River.1
- Fort Gratiot, probably [on site of Port Huron]1
- Harsen's Island1
- In St. Clair River near Algonac.1
- In valley of Sac River on west side, Francis Lake & slough south of it, 6 mi southeast of Roscoe.1
- Kimball Twp. 460 meters west of I-94; 730 meters south of Ashley Road.1
- Lake St. Clair1
- Lakeside Cemetery.1
- Marine City1
- Median of I-94, ca. 3.4 km NE of Wadhams Road interchange, ca. 15 km SW of Port Huron.1
- Near Algonac1
- Near Algonac,1
- Near Algonac, West of Roberts' Landing in an old field.1
- Near Capac1
- Near Capac [MICH] Port Huron [MSC]1
- Near Capac.1