Mario DiGregorio
Mario DiGregorio is President of the Botanical Club of Cape Cod and the Islands; JEFF WALLNER interprets natural history at Saguaro National Park in the Sonoran Desert in Arizona and at the Black Canyon of the Gunnison National Park in Colorado. The authors have also collaborated on Wildflowers of the Cape Cod Canal (1985) and Mountain Flowers of New England: A High Country Heritage (1997).