- NE of Hwy 8, ca 2 km SE of Goderich1
- NW side of Rt. 25, ca. 9.5 km SW of Caseville1
- Near Caseville, near Lake Huron Shore.1
- Near Harbor Beach.1
- Near Lake Huron.1
- Near Port Austin1
- Near Sebewaing.1
- Near shore of Lake Huron, Pointe Aux Barques.1
- North Island, near an old barn, Saginaw Bay.1
- Oak Point.1
- On fairgrounds of Harbor Beach.1
- Port Austin.1
- Port Crescent State Park day use area. Just south (inland) of second (last) dune ridge of Lake Huron beach, about 350 m west of mouth of Pinnebog River.1
- Port Crescent.1
- Rocky soil, Pointe Aux Barques.1
- Saginaw Bay, Wildfowl Bay Island.1
- Sebewaing, along railway1
- Sebewaing.1
- Stony Island, Saginaw Bay.1
- Tree Farm, Bayport.1