Bill Cullina

William (Bill) Cullina is the F. Otto Haas Executive Director of the Morris
Arboretum of the University of Pennsylvania. Prior to this he was the
President and CEO of Coastal Maine Botanic Garden for eleven years.
Cullina holds degrees in plant science and psychology, has been working in
public horticulture for 25 years, and has extensive experience in
horticultural and forestry research, and commercial nursery production. A
well-known author and recognized authority on North American native
plants, Cullina lectures on a variety of subjects to garden and professional
groups and writes for popular and technical journals. His books include,
Wildflowers; Native Trees, Shrubs, and Vines; Understanding Orchids;
Native Ferns, Mosses, and Grasses, and Understanding Perennials.