Lady Emma Winifred Hardcastle O'Malley (1847 – June 25, 1927) was a British botanical collector and writer.
Emma Winifred O'Malley was born in 1847 in Essex, the second daughter of Joseph Alfred Hardcastle, Member of Parliament (MP) for Colchester and Bury St Edmunds, and Frances Lambirth O'Malley. Her siblings included the diarist Mary Collier.
In 1869 she married Edward Loughlin O'Malley, a lawyer and judge. She accompanied him to numerous postings in the British Empire, including Jamaica and Hong Kong. She collected local plants, with a specialization in ferns, and donated specimens to the British Museum. She also wrote an article on the ferns of Hong Kong for Hardwicke's Science-Gossip.
Emma Winifred O'Malley died on 25 June 1927.
Family
O'Malley had five children:
Charles Loughlin Meyler O'Malley (1873-1952)
George Peter Bermingham O'Malley (1875-1885)
Marie Aglaïa Margery O'Malley (1880-1962)
Grace Evangeline "Eva" O'Malley (1884-1960), memoirist
Owen St. Clair O'Malley (1887-1974), diplomat