Ornamental Horticulture: Science, Operations & Management,3rd ed
Jack E. Ingels is a distinguished professor in the department of plant science at the State University of New York at Cobleskill.  He is a member of the Associated Landscape Contractors of America and was named by Lawn and Landscape magazine one of the top ten landscape educators in America.  Mr. Ingles has written numerous publications about ornamental horticulture.