Edward Stuart Cardinal Dyke (24 August 1872 – 21 January 1915) was a prominent naturalist, photographer, and botanical explorer in South Africa during the late 19th to early 20th century. He associated with the leading botanical lights of the day, including Rudolf Marloth, to whom he donated many specimens and many of the photographs that appeared in Marloth's monumental work, “The Flora of South Africa”. Some plant species were named after him. As a young man he fought in the Second Boer War. In World War I he was one of the first to die in the campaign in South-West Africa.