Place
- Highway 2.1
- Highway 275 just north of Highway 34 at Glenwood1
- Howard1
- Indian Bluffs State Preserve, S.E.1
- Iowa City (East).1
- Iowa Lakeside Laboratory Grounds1
- Jefferson1
- Johnson twp., Sec 20. Hwy. 20, 10 mi west Ft. Dodge. Moist soil depression along roadside1
- L. Okaboji.1
- L[ake]. Okoboji.1
- La Porte1
- La Porte City1
- Lacey Keosauqua State Park, Keosuaqua1
- Lacey-Keosauqua State Park1
- Lake Twp, Sec 34, shore of Round Lake.1
- Lansing1
- Ledges1
- Ledges State Park1
- Lucas1
- Mass's Timber.1