Alison Marjorie Ashby MBE (7 February 1901 – 12 August 1987) was an Australian botanical artist and plant collector.

[1] From 1944, after both her parents had died, Ashby began to make longer trips to collect plants as specimens for various herbaria and also to propagate from seeds and cuttings.

From 1963 to 1977, she made regular car journeys each year to collect and illustrate plants, driving to Southwest Australia in the winter and to the Australian Alps in the summer.

[1] Ashby's inherited section of her family's Wittunga property was donated to the National Trust of South Australia in 1957 and became the 32 ha Watiparinga Reserve.

Her 1500 botanical paintings were mostly donated to the South Australian Museum and are now held in the State Herbarium.