Ohio's Trees Author:Guy L. Denny, Alvin E. Staffan The Ohio Trees booklet was not designed as a technical reference for the advanced student of forestry, but rather as a very basic field reference for the person who wants simply to become familiar with some of the more common trees found in Ohio. — Individual trees represented here were selected solely on the basis of how frequently they are apt ... more »to be encountered in the field. For this reason we have also included a few of the more common, but, non-native ornamental trees such as horse chestnut, catalpa and tree-of-heaven.« less