[1] She became assistant lecturer in Botany at Bristol in 1919, before moving to Birkbeck College, University of London the next year.

There was a striking increase in the number of students, and a vigorous research programme was undertaken, closely related to local issues.

The majority of it is made up of a systematic treatment of around 750 species of algae, occurring round the coasts of the British Isles.

[1] During the Second World War, the Ministry of Health was concerned about a possible shortage of agar, essential for scientific, food and medicinal purposes.

[7] Newton was asked to coordinate botanical work involving large scale production of agar from suitable British seaweeds.

In addition, she was responsible for the field surveys in Wales and north of the Firth of Lorne, for the work on Gigartina stellata and Chondrus crispus, and for editing the published volume.

[1] Mining operations in the 19th century meant the river was polluted with lead and zinc that adversely affected plant and animal life.

She also lectured on fossil and flowering plants, plus playing an important role in the early work of the Nature Conservancy in Wales.

[3] She married Dr William Charles Frank Newton in 1925, a cytologist at the John Innes Horticultural Institute.

London: British Museum, 1931 Newton, L. Plant distribution in the Aberystwyth district: including Plynlimon and Cader Idris.