- Mackinac Island, Crooked Tree Drive2
- Prentiss Bay2
- Shore of Lake Huron at Bush Bay2
- Swamp around small bog lake NNW of Big Knob2
- Swamp on Rock River Road 0.6 mi from Big Knob Road2
- Thuja swamp on Rock River Road 0.6 mi from Big Knob Road2
- Woods c. 0.5 mi from US Hwy 2 on Big Knob Road2
- c. 0.5 mi from U.S. Hwy. 2 on Big Knob Road2
- Along Crow Lake Trail c. 2.5 mi along road from Big Knob1
- Along Crow Lake Trail c. 2.5 mi along road from Big Knob Campground1
- Along Crow Lake Trail c. 2.5 mi along road fron Big Knob Campground1
- Along Crow Lake Trail, c. 2.5 mi. from Big Knob Campground1
- Big Knob Campground on Lake Michigan, 40 miles west of St. Ignace1
- Big Knob Road c. 3 mi from campground1
- Bush Bay1
- Bush Bay, ca. 5 miles east of Cedarville along M134, across from Port Dalomite1
- Bush Bay, south side of M-134, 0.6 mile east of Cedarville1
- Bush Bay, south side of M-134, 0.6 miles east of Cedarville, along Lake Huron1
- C. 0.6 mi from U.S. Hwy. 2 on Big Knob Road1
- Contact UM Herbarium1