She collected and painted flowers and mosses throughout the British isles, and her work was widely reproduced in a series of popular books issued by the Society for Promoting Christian Knowledge.
[2] In 1830, Emily's father inherited Trehane, a large estate with a Queen Anne mansion, and a few years later the family settled there.
The manor house burned to the ground in 1946, but the estate's home farm, Trehane Barton, is now a listed Site of Special Scientific Interest.
[2] Stackhouse painted more than 620 watercolours of plants from nature and assembled collections of mosses, flowers, and grasses, traveling all over the British Isles to do so.
[2] In 1846 and again in 1853, her botanical watercolours won a bronze medal in the natural history competition of the Royal Cornwall Polytechnic Society's annual exhibition.
[2] Sometime in the mid 1840s, the botanist Charles Alexander Johns saw Stackhouse's watercolours and asked her to provide illustrations for a series of popular natural history books that he was publishing through the Society for Promoting Christian Knowledge.