German botanist (1876–1927).
Friedrich Karl Johann Vaupel ( 23 May 1876, Kreuznach – 4 May 1927, Berlin) was a German botanist who specialized in the study of cacti. He was the binomial authority of many species within the family Cactaceae. He studied medicine and natural sciences in Berlin, Heidelberg and Munich, obtaining his PhD in 1903 as a student of Karl Ritter von Goebel at Munich. While still a student, he participated in a scientific journey to Mexico and the West Indies (1899–1900). Following graduation, from 1903 to 1907, he was involved in an extended expedition to India, Australia and Samoa. In 1908 he began