Over the past decade, Wildflowers of Ohio has become the standard for field identification in Ohio, used by both college biology students and wildflower enthusiasts alike. This second edition marks the 10th anniversary of Robert L. Henn's popular guide. It has been expanded to include more than 300 species of wildflowers arranged by color and taxonomy, each with a thorough description of characteristics, habitat, distribution, and human uses. Henn includes a glossary, diagrams of flower parts and leaf arrangements, and a succinct, informative introduction. Designed for durability, the guide retains its innovative side-flip design for ease of use. Any Ohioan or resident of neighboring states who is captivated by the wonders of the natural world will find this pocket guide to be indispensable.