British botanist, zoologist and botanical collector (1939–2025).
Margaret Ann Dix (19 May 1939 – 2 June 2025) was a British-born Guatemalan botanist and taxonomist. In 1972, she founded the Center for Environmental Studies and Biodiversity (Centro de Estudios Amientales y de Bioversidad) at the Universidad del Valle de Guatemala in Guatemala City. Her research focused on Guatemalan orchids and orchid taxonomy, as well as plant behavior and limnology.