- Ilak Island1
- In moister places in mixed coniferous woods, along east fork of Potlatch Creek, 10 miles east of Povill, Twp. 41 N, R. 2 E, S. 20.1
- In shallow, stagnant water, heavily shaded; Patricks Creek1
- Indian bowl area1
- Itasca1
- Jackson1
- Jefferson1
- King1
- Koehler Twp, Roberts Lake, ca. 3 mi ESE of Indian River1
- Lander1
- Lane1
- Lapeer1
- Lehigh1
- Lewis1
- Little Chapel Lake1
- Lowell Township, ca. 1.5 mi SW of City of Lowell, between 36th St. and Alden Nash Ave. SE. B.D. White Nature Preserve (Land Conservancy of West Michigan).1
- Lowlands & creek valley west of Pyramid Cove, Massacre Bay, Attu Island.1
- Lucas1
- Madera1
- Maine1