Mary_Bowerman Dr. Mary Leolin Bowerman (January 25, 1908 - August 21, 2005) was a botanist and author of The Flowering Plants and Ferns of Mount Diablo, California; Their Distribution and Association into Plant Communities, and co-founder of "Save Mount Diablo" helped to preserve tens of thousands of acres of Mount Diablo in the San Francisco East Bay, before dying at age 97.