Rosa Olga Sansom QSM (née Jensen; 3 June 1900 – 1 July 1989) was a New Zealand teacher, museum director, botanist, broadcaster and writer.
[1][2] As director, she was assisted by volunteers to develop displays on natural history, teach visiting school children, and identify biological specimens brought in by the public.
[1] Sansom collected botanical specimens that included seaweeds, alpine and bog plants, lichens and ferns over the course of more than 50 years.
In 1956 she was invited to give the Banks Lecture on botany at the annual conference of the Royal New Zealand Institute of Horticulture.
She wrote a monthly newsletter about Stewart Island for three years from 1962, and was a book reviewer and features writer for the Southland Times.