A PDF field guide to the species reported in and around Cahokia Flatwoods Forest Preserve, 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 Cahokia Flatwoods Forest Preserve include Barred Owl, Buckthorn, Purslane, Snow Trillium and Poison Ivy. Plants lead the list with 47 species.
The 20 species reported most often here, of 50 in the full guide.

Buckthorn
Purslane
Snow Trillium
Poison Ivy
Snapweed
Mayapple
Poke
Hedge Garlic

Squawroot
Heal-All
Horseweed
Bedstraw

Myrtle

Ashweed

Moneywort

Obedience
Hard Maple
Blackcap