Baltic german botanist (1848-1900).
Constantin Georg Alexander Winkler (14 June 1848 in Medvedevo near Velikiye Luki – 3 February 1900 in Wesenberg) was a Russian botanist of Baltic-German heritage. From 1871 to 1874 he studied botany at the Imperial University of Dorpat, where from 1874 to 1879, he worked as an assistant to Edmund Russow at the botanical garden. In the meantime he taught classes in natural sciences at several schools. From 1879 to 1899 he was associated with the Saint Petersburg Botanical Garden; as curator of its herbarium (1879–97) and as head botanist (1897–99). At Saint Petersburg he played a major role in