PTERIDOPHYTA, GYMNOSPERMAE AND MONOCOTYLEDONES

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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.