Benson was born 20 October 1859 in London to William Benson and Edmunda Bourne, who was the daughter of the landscape painter James Bourne. Benson's mother was also a painter and exhibited at the Royal Academy of Art. Benson was introduced to botany by her father, an engineer and architect with an interest in the subject. She was first educated by her sister, who had attended Queens College. In 1878-9 she studied Classical Studies for one year at Newnham College, Cambridge, before working for seven years as a teacher at Exeter High School in order to have the finance for university study. She then matriculated to University College London in 1887 and earned her bachelor's degree in Botany with first class honors from the university in 1891. She gained a Marion Kennedy research scholarship and got her doctorate in 1894 from the University of London, working with Francis Wall Oliver. Her work focused on embryology of a category of Fagales that were called Amentiferae at the time.
Work and achievements
Benson started working as a lecturer at Royal Holloway College in 1889. Benson was appointed head of the Botany Department at Royal Holloway College in 1893, and remained so until her retirement in 1922. She was the first female Botanist to become a department head in the UK. In 1897, Benson travelled around Europe with Ethel Sargent to gain equipment and knowledge to set up the department. Benson is also credited with planning and stocking the Botanical Garden, Herbarium and Museum. Benson made various collecting trips for botanical material, including to Australia in 1905–1906, and to Australia, Java and India in 1914-15. Her observations of herbaceous plants from the early Paleozoic and the earliest true ferns are considered notable. She proposed a model for the evolution of the ovule, which remains a likely explanation. She also described the species Cordaites felicis found in coal deposits in England. To adopt the new technique of microscopic anatomy of fossils, she cut sections herself with a gas-powered machine in her garden shed. Her papers are characterised by precise drawings and wash-paintings which are believed to be produced by Benson herself. In 1904, she became a fellow of the Linnean Society of London, one of the first fifteen women who were admitted. In 1912 she was made a Professor by the University of London.
Death and Legacy
Upon her retirement in 1922, she was succeeded by Professor Elizabeth Marianne Blackwell as Head of Botany at Royal Holloway College. Benson died on 20 June 1936, and Blackwell authored Benson's official obituary.
Publications
M Benson Contributions to the Embryology of the Amentiferæ.—Part I.Transactions of the Linnean Society of London. 2nd Series. Botany 3:409-–424
M Benson A new Lycopodiaceous seed-like organ. The New Phytologist 1: 58-59
M Benson The fruitification of Lyginodendron oldhamium. Annals of Botany os-16: 575–576
M Benson Telangium Scotti, a new Species of Telangium showing structure. Annuals of Botany 18: 161-177
M Benson, E Sanday, E Berridge III. Contributions to the Embryology of the Amentiferæ.—Part II. Carpinus Betulus.Transactions of the Linnean Society of London. 2nd Series. Botany 7:37–44
M Benson The Sporangiophore - A Unit of Structure in the Pteridophyta. The New Phytologist 7: 143-149