He wrote an article for the journal Nyt Magasin for Naturvidenskaberne in 1899 where he described what he had observed, amongst other things the discovery of Utricularia ochroleuca in Northern Norway.
Utricularia | Utricularia minor | Utricularia humboldtii | Utricularia sect. Foliosa | Utricularia resupinata | Utricularia ochroleuca | Utricularia costata | Utricularia australis |