Martha Elizabeth Newton (11 November 1941 - 4 January 2020) was a British bryologist and botanist, specialising in cytology and field surveying.
Her first academic post in 1964 was as a research assistant at University College of North Wales, Bangor with Tony (AJE) Smith.
During her doctoral work at Bangor she found her speciality in the cytology of mosses and liverworts as well as their identification and biogeography.
[2] Her expertise in bryophyte identification and biogeography led to her consultancy work for the Countryside Council for Wales in the 1990s.
Between 2004 and 2012 she monitored Afon Ty-cerrig for the Environment Agency for one of the few detailed records of bryophytes both before and after a hydropower scheme was installed.