References:

Photo Credits
Larch, Eastern or American (Larix laricina) - Fruit
Daniel Tigner, Canadian Forest Tree Essences.
Sassafras (Sassafras albidum) - Leaves, Summer
Daniel Tigner, Canadian Forest Tree Essences.

Waterlocust (Gleditsia aquatica) - Fruit
Shirley Denton, Atlas of Florida Vascular Plants. © 2002 Institute for Systematic Botany. University of South Florida, Tampa. http://www.florida.plantatlas.usf.edu/Photo.aspx?id=9251
Hickory, Mockernut (Carya tomentosa) - Fruit
Pecan (Carya illinoinensis) - Fruit
James Tobolski, Professor Emeritus of Biology, IPFW

All other photos:
 Rich Weber, Horticulturist, Physical Plant - Grounds Department, IPFW