John Patrick Rourke FMLS (born 26 March 1942, in Cape Town) is a South African botanist, who worked at the Kirstenbosch National Botanical Garden and became curator of the Compton Herbarium.
He started working at Kirstenbosch from 1966, and succeeded Winsome Fanny Barker as curator of the Compton Herbarium in 1972.
He published several revisions of Proteacean genera including Leucadendron, Leucospermum, Mimetes, Vexatorella, Sorocephalus and Spatalla.
[1] During his career he collected approximately 2000 specimens of flora from the southwestern and southern Cape, Namaqualand and eastern Transvaal.
[2] In 2003 Rourke was awarded the "Gold medal for Lifetime Preservation of the Environment" by The Cape Tercentenary Foundation.