High Quality Content by WIKIPEDIA articles! Dr. Robert Greenleaf Leavitt (1865–1942), born at Parsonsfield, Maine, was an early American Harvard-educated botanist and widely-published author in the field of botany, as well as an early college and high school educator in the natural sciences. Leavitt also worked for nine years as a botanical researcher at the Ames Botanical Laboratory in North Easton, Massachusetts.