| Intro | Botanist |
| Was |
Scientist Botanist |
| From | United States of America |
| Type | Science |
| Gender | female |
| Birth | 5 January 1893, Arcade, Wyoming County, New York, U.S.A. |
| Death |
April 1977 (aged 84 years) |
LaDema Mary Langdon (5 January 1893 – April 1977) was an American botanist known for her work on floral anatomy, taxonomy, embryology, and morphology of Juglandaceae, Fagaceae. Cycas, and Dioon spinulosum. She was a member of the American Association for the Advancement of Science and was a professor at Baltimore Junior College and Goucher College. She earned her bachelor’s degree from Oberlin College and her graduate degrees from the University of Chicago.