French botanist (1833-1911).
Nestor Léon Marchand (15 April 1833 – 16 April 1911) was a French medical doctor, pharmacist, and botanist. He is known for his studies of the flowering plant family Anacardiaceae. He studied in Tours and Paris, subsequently earning a bachelor of science degree (1860), a doctorate in medicine (1861), a first-class license in pharmacy (1864) and a doctorate in natural sciences (1867). He later became a professor of botanical cryptogamy at the École supérieure de pharmacie in Paris. He was mayor of Thiais, France from 1881 to 1887.