Background
Stephens was born on December 6, 1884 in Cape Town, South Africa, as the daughter of Michael Stephens, who was a chief locomotive superintendent of the Cape Government Railways and Annie Hoskyn.
Stephens was born on December 6, 1884 in Cape Town, South Africa, as the daughter of Michael Stephens, who was a chief locomotive superintendent of the Cape Government Railways and Annie Hoskyn.
She studied at the South African College (which later became the University of Cape Town) and later that year received the Bachelor of Arts degree at the University of Cape of Good Hope.
In 1901, she matriculated at the Rustenburg School for Girls in Rondebosch, Cape Town. In 1908, Stephens published A preliminary note on the embryo-sac and embryo of certain Penaeaceae in the Annals of Botany, which was based on her research that she started since the South African College. Though her studies did not lead to a qualification since the Cambridge University did not award degrees to women during those years, she was elected as a fellow of the Linnean Society of London.
Around 1911, Stephhens returned to South Africa.
During the first half year of 1913, she was a temporary lecturer in botany at the South African College and later succeeded West.T. Saxton, as a lecturer in botany and remained in the Department of Botany when the college became the University of Cape Town in 1918, until she retired in 1940. She then became honorary reader in plant taxonomy at Bolus Herbarium in 1952.
She made a special study in freshwater algae and fungi, known for her two illustrated booklets on poisonous and edible fungi and also contributed the Pennaeaceae. She continued as honorary reader in systematic botany (cryptogams) in Bolus Herbarium until her death in 1966.