Margaretta Riley, née Hopper (May 4, 1804 – July 16, 1899), was an English botanist.
She studied ferns and was the first British pteridologist of her sex.
She was born in Castle Gate, Nottingham on 4 May 1804 to Richard and Margaretta Hopper.
[1] She married John Riley in 1826, agent for the Montague family in Papplewick, north of Nottingham, where she lived for the rest of her life.
[1] Margaretta Riley and her husband worked together as pteridologists studying ferns.