Austrian taxonomist (1863-1928).
Franz Thonner (11 March 1863 – 21 April 1928) was an Austrian taxonomist and botanist from Vienna. In the spring of 1896, he made his first trip to the African interior to explore the botany and people in the northern part of the Congo Basin. Besides his comprehensive collection of plants, he embarked on a thorough ethnographic study of the region. He was a scientist of independent means who explored Europe and North Africa and in 1891, at age 28, privately published a key to the families of flowering plants of the world. Despite the work's having been translated into English in 1895, it was