As a child, Brewis had spent long holidays studying the
orchids on
Noar Hill, near
Selborne in Hampshire. Over 27 years, she meticulously catalogued hundreds of species of
vascular plants, and co-authored with
Francis Rose and Peter Bowman the definitive guide to Hampshire's plant life,
The Flora of Hampshire, published in 1996. She was a member of the
Wild Flower Society and the
Botanical Society of Britain and Ireland. Brewis was also an environmental activist and spearheaded the campaign to make the
British Ministry of Defence aware of the damage that training caused to flora, fauna and the wider natural environment. In retirement, Brewis was a warden at the Noar Hill nature reserve, working for the
Hampshire and Isle of Wight Wildlife Trust. Every summer, she would organise "botanical safaris" for local children. == Awards ==