Education
He graduated in natural history from the University of Copenhagen under professor Eugenius Warming.
He graduated in natural history from the University of Copenhagen under professor Eugenius Warming.
He was then a school teacher in Copenhagen, and later superintendent at the Botanical Museum. He was a specialist in ferns and published a catalogue of the World"s Pteridophytes, Index Filicum. In addition, he authored a three-volume work on the history of botany in Denmark.