Visit these links for more detailed descriptions and information on selecting the right trees and plants for your yard:

University of Illinois Extension
Selecting a Tree for Your Home   https://web.extension.illinois.edu/treeselector/
Selecting a Shrubs for Your Home   https://web.extension.illinois.edu/shrubselector/
Wildflowers   https://web.extension.illinois.edu/wildflowers/

USDA Natural Resources Conservation Service
Plants Database   https://www.plants.usda.gov 
Illinois Wildflowers   https://www.illinoiswildflowers.info/