Flora of Missouri Project through Missouri Botanical Garden

Flora of Missouri Project Link on "efloras"

Atlas of Missouri Vascular Plants

Sperry Herbarium, Pittsburg State University

Checklist of Liverworts of the Interior Highlands  

U.S. Forest Service website: Celebrating Wildflowers

Columbia Chapter of MoNPS

Kansas City Chapter of MoNPS

Dan Tenaglia's Images of Missouri Native & Naturalized Plants

Mo. Dept. of Conservation Natural History Section Nature Page 

Missouri Prairie Foundation

Exotic invasive plants in Missouri

Center for Plant Conservation's Gardener's Tip Sheet (PDF)