A PDF field guide to the species reported in and around Iowa River Corridor WMA - Otter Creek Marsh, with common and scientific names and up to 3 photos of each, laid out for use in the field and offline.
Species people report often in and around Iowa River Corridor Wma - Otter Creek Marsh include Japanese Beetle, Oat, Wild Geranium, Safflower and Burningbush. Plants lead the list with 11 species.
All 12 species reported here.

Oat
Wild Geranium

Safflower
Burningbush

Gooseneck Loosestrife
Tell me what you're looking for, and I'll do my best to answer.
Horseweed

Coolweed

Large Loosestrife

Disc Mayweed

Motherwort
Japanese Beetle