Margaret Ursula Mee, (born 22 May 1909 - 30 November 1988) was a British botanical artist who specialized in plants from the Brazilian Amazon rainforest. She was also one of the first environmentalists to draw attention to the impact of large-scale mining and deforestation on the Amazon Basin.
She studied art at St. Martin's School of Art, London. In 1950 she attended the Camberwell School of Arts and Crafts, where she learnt her style of illustration, and received a national diploma in painting and design in 1950. She moved to Brazil with Greville Mee, in 1952 to teach art in the British school of São Paulo. Her first expedition was in 1956 to Belém in the Amazon Basin. She then became a botanical artist for São Paulo's Instituto de Botanica in 1958, exploring the rainforest and more specifically Amazonas state from 1964, painting the plants she saw, some new to science, as well as collecting some for later illustration. She created 400 folios of gouache illustrations, 40 sketchbooks, and 15 diaries.