Wilhelm Gustav Franz Herter  Wilhelm (Guillermo) Gustav Franz Herter (10 January 1884 in Berlin – 17 April 1958 in Hamburg) was a German botanist and mycologist. In 1908 he received his doctorate in Berlin with a dissertation on the genus "Lycopodium". From 1923 to 1939 he lived and worked in Uruguay, gaining Uruguayan citizenship in 1925. In Montevideo, he was associated with its botanical garden and museum, and in the meantime taught classes at the university. In 1934 he became director of the "Revista Sudamericana de Botánica". Known for his work in the fields of systematics and taxonomy, he is credited with identifying more than 200 species new to science. He was a leading expert on the botanical order Lycopodiales. Taxa with the specific epithet of "herteri" are named in his honor, an example being the mycological species "Tulostoma herteri".