Annie Lorrain Smith (23 October 1854 – 7 September 1937) was a British lichenologist whose Lichens (1921) was an essential textbook for several decades.

[1] Though born in Liverpool,[2] she lived with her family in rural Dumfriesshire where her father Walter was Free Church of Scotland minister in Half Morton parish a few miles north of Gretna Green.

[3] Scott found work for Lorrain-Smith at the Natural History Museum to curate Anton de Bary's collection of slides of microscopical fungi,[3] but she had to be paid from a special fund because women could not officially be employed there.

[1] She identified and reported on newly collected fungi, arriving from abroad as well as from the UK, and in total worked in the museum's cryptogamic herbarium from 1892 until 1933.

[3] In 1931, when she was nearly seventy-seven, she was awarded a civil list pension "in recognition of her services to botanical science" and she retired the following year.