Discover Life - All Indiana species listed, approximately half with photographs. Type scientific name into the Search box:
Eastern Region USDA Forest Service:
Friesner Herbarium, Butler University - Information on the collection and the flora of Marion County, photos of spring wildflowers and plants from the Butler University Prairie:
Guide to Wildflowers of Twin Swamps Nature Preserve, Posey County, Indiana - Excellent photos and information:
Hayes Arboretum - photos and info from the arboretum in Richmond, IN:
Indiana Academy of Science - publications, biodiversity and state taxonomic experts information:
Indiana Native Plant and Wildflower Society:
Indiana Natural Heritage Data Center, Division of Nature Preserves, Indiana Department of Natural Resources:
The Nature Conservancy, Indiana Chapter:
vPlants - a virtual herbarium of the Chicago Region, including plants of Northern Indiana:
Deam, C.C. 1940. Flora of Indiana. Indianapolis, IN: Department of Conservation, Division of Forestry.
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region, 4th ed. Indianapolis, IN: Indiana Academy of Science.
Gleason, H. A. and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada 2nd ed. New York, NY: New York Botanical Garden.
Picture Guides and Specialty Books
Antonio, T.M.and S. Masi. 2001. The Sunflower Family in the Upper Midwest. Indianapolis, IN: Indiana Academy of Science.
Homoya, M.A. 1993. Orchids of Indiana. Indianapolis, IN: Indiana Academy of Science.
Jackson, M.T. 2004. 101 Trees of Indiana—a Field Guide. Bloomington, IN: Indiana University Press.
Wampler, M. and F. Wampler. 1988. Wildflowers of Indiana. Bloomington, IN: Indiana University Press.
Yatskievych, K. 2000. Field guide to Indiana wildflowers. Bloomington, IN: Indiana University Press.