CHRISTIANIA VIDENSK.-SELSK. FORHANDL. 188 4. No. 12. III 



The first botanist, who is supposed to have collected mosses at 

 Christiania, is Georg Christian Oeder (born 1728 f 1791), pupil of 

 Haller at Gottingen. In the Flora danica he has delineated 

 two mosses gathered by him at Christiania: Dicranum Blyttii and 

 Blasia pusilla. Professor Christen Smith (born 1785 f 1816 on the 

 coast of Congo) gathered in the beginning of our century mosses 

 at Christiania, where he found Tayloria tennis. Before all others 

 Professor M. N. Bhjtt (f 1862) has contributed most to the knowledge 

 of the moss-flora of Christiania. On the ground named he has ga- 

 thered about 260 species of mosses, among which some were not 

 known before, for instance Dicranum elatiwi, Mnium cinclidioides 

 and JBrachj/thecium erythrorrhison. 



The Eeverend S. C. Sommerfelt (f 1838) and Prof. W. Boeck 

 (f 1875) have also collected many rare mosses near Christiania. Of 

 a later date are the investigations of the mosses of this region made 

 by Prof. Ax. Blytt, who. detected Hypnum 7iiontanum then unknown 

 to Europe, those made by Dr. N. Wulfsberg^ B. Kaalaas, and since 

 1865 by the author. 



Also some foreign bryologists have during short stays contri- 

 buted to the moss-flora of the region. Their names will be found 

 on the foUowing page 3. Here we will only name of Swedes 

 J. R Zetterstedt (1858, 1868 and 1870), Prof. S, 0. Lindberg 

 (1882); of Germans A. Geheeh (1880); and of Frenchmen the cele- 

 brated Prof. W. Pk Schimper (1844). 



The moss-flora of Christiania must be considered as tolerably 

 well explored, but much is yet left to be done, considering that 

 wide parts of the territory are only cursorily traversed or examined 

 on single spots. Only in the last half year (1884) not less 

 than 12 new species were detected. Namely in the way of the he- 

 paticae much is yet to be done. 



The moss-flora in question is among the richest in Norway aud 

 of the richer ones in Europe. In the said region 359 mosses aud 

 77 hepaticae have been collected. The proportion between the known 

 phanerogames and mosses at Christiania is about 900 species of 

 phanerogames to 359 mosses or as 100:40. In the whole of Norway 



a* 



