Mary Leolin Bowerman (January 25, 1908 – August 21, 2005) was an American botanist, co-author of The Flowering Plants and Ferns of Mount Diablo, California; Their Distribution and Association into Plant Communities[1], and the co-founder of Save Mount Diablo. She helped to preserve tens of thousands of acres of Mount Diablo in the San Francisco East Bay before dying at age 97.[2] In 1936 she was the last person to record the Mount Diablo buckwheat Eriogonum truncatum, until it was rediscovered nearly seventy years later on May 10, 2005.[3] In 1978 the manzanita Arctostaphylos bowermaniae was named in her honor.[3]