Karl Schumann am Arbeitstisch 1897-03-14 (Monatsschrift für Kakteenkunde, Jg. 14, April 1904)

Photograph of the german botanist karl schumann (1851–1904) – taken from the publication monatsschrift für kakteenkunde. Schumann at the age of 45 sitting at his worktable on april 14, 1897. Date: Taken on 14 March 1897; 1904 (year of publication).