Pteridophyta Gymnospermae and Monocotyledones

In the year 1896 Prof. Warming invited the late Mr. O. Gelert to make a revision of the following plants and ferns of the Arctic regions as the many scattered list and treatises in which each author used his own nomenclature made the study of them very troublesome. The knowledge of the Arctic regions was by that time so far advanced that among the following plants and ferns no considerable additions to the flora with regard to still unknown species might be expected.