Identifies the trees and shrubs of North America, using simple identification keys...

Images of insect pests, plant diseases, and insect damage...

Exquisite detailed photographs of flowers and plants of Missouri (many of which are found in Ohio as well) color- and leaf-keyed...

A source for vascular plants, mosses, liverworts, hornworts, and lichens indigenous to the United States and its territories, as well as information on endangered, agriculturally useful, noxious and wetland indicator species...