I am grateful to the late Mr. Fred Siemert, State Forester of the
Illinois Division of Forestry, for suggesting the need for a new “Forest
Trees of Illinois.” The first and second editions of this work have been
immensely popular, and the need for a third edition is gratifying.
This third edition is only slightly modified from the second. A few
illustrations and bark photographs have been substituted, and the key
has been improved in places. New material has been added to the
description of the water hickory.
I wish to give thanks to Mr. Al Mickelson of the Illinois Division of
Forestry for encouraging this third edition, and to his assistants, Mr.
John Sester and Mr. Ernest Kunze, for editing it for publication. Mark
Mohlenbrock has redrawn the leaves and fruit illustrated on pages 101
and 169.