Ferns, Spikemosses, Clubmosses, and Quillworts of Eastern North America - Emily Sessa

Emily B. Sessa is a botanist with more than fifteen years' experience studying the ecology and evolution of ferns and lycophytes. She is the Patricia K. Holmgren Director of the William and Lynda Steere Herbarium at the New York Botanical Garden, and a former president of the American Fern Society.