Benjamin Clemens Masterman Stone (July 26, 1933, Shanghai, China – March 19, 1994, Manila, Philippines) was a British–American botanist.
Stone was born in Shanghai, China to a British father, who worked for the government, and an American mother.
He graduated from Pomona College in Claremont, California and, in 1960, received a Ph.D. from the University of Hawaii.
Stone became the Botany Department Chair of the Philadelphia Academy of Natural Sciences and participated actively in its Flora of the Philippines Project.
For this he spent time with the Bishop Museum in Honolulu and, later, the Botanical Research Institute of Texas (BRIT) in Fort Worth.