Apprenticed as an engraver, Pohl collaborated with botanistAdolf Engler (1844–1930) for over forty years on several of Engler's important works. Pohl's work is acclaimed for its accuracy and not its artistic quality. His illustrations are considered especially valuable due to destruction of many of the actual plants midst the bombing of the Berlinherbarium during World War II. The following are a list of Engler's major publications that Pohl provided illustrations for: