PREEAGE: 
N the year 1896 Prof. Warming invited the late Mr. O. Gelert to make 
I a revision of the flowering plants and ferns of the Arctic regions, 
as the many scattered lists and treatises, in which each author 
used his own nomenclature, made the study of them very trouble- 
some. The knowledge of the Arctic regions was, by that time, 
so far advanced, that, among the flowering plants and ferns, no 
considerable additions to the flora, with regard to still unknown 
species, might be expected. — On that account it would be appro- 
priate to collect all the scattered statements in one work, trying at 
the same time, if feasible, to revise the statements in such manner, 
that a flora of this kind might be a reliable proof of those species 
which were known in the Arctic territory, and of their distribution 
there. — The Copenhagen-University-Botanic-Museum was, on 
account. of its rich Arctic collections, especially from Greenland, 
well adapted to form the basis of a critical revision. 
To form an idea how great and extensive such a work might 
prove, Mr. Gelert made a revision of the genus Draba and other 
Cruciferae, the result of which was his treatise »Notes on Arctic 
Plants, I<?. Then he desired me to co-operate with him, a desire 
with which I complied with pleasure. Through the liberal aid of 
the Carlsbergfund, during several years, we were enabled to spend 
a great deal of our time on this revision. Mr. Gelert especially 
took up the work indefatigably, until overcome by his malady. He 
suffered from phthisis, and on March 10', 1899, he died, 37 years old. 
So I was left alone with the work, of which, however Mr. Gelert 
* Botanisk Tidsskrift, vol. 21, 1898, Kjobenhavn. 
