Background
He was born at a farm in Vonsbæk parish in the Duchy of Schleswig.
He was born at a farm in Vonsbæk parish in the Duchy of Schleswig.
He became a school teacher at Ørslev in Zealand, where he studied the local flora. He was particularly interested in plants useful to agriculture and in plant pathogens. He was a prolific writer on these topics.
He undertook meticulous studies of rust fungi.
He was the first to describe the host alternation of Puccinia poarum between grasses and Tussilago farfara.
