CHRISTIANIA VIDENSK.-SELSK. FORHANDL. 1 8 8 4. No. 12. IX 



ture woiild undertake this international work. An application to the 

 bryologists of the various countries in Europe to supply him with 

 manuscript local lists would also contribute to make the said table 

 more exhausting. 



Of the quoted localities the islands Hove dø (7). which con- 

 tains 0.5 km- and only rises 40—50 m above the level of the sea, 

 and Næsø (14) containing 2.95 km^ with an elevation af 55 m 

 exemplify the limestone and clay slate flora; however it must be 

 observed, that several beds of greenstones or porphyries traverse 

 the silurian rocks and thus mix up the flora with silicious mosses. 

 Of the rarer kinds of mosses on the Hovedø ought to be cited the 

 Grimmia anodon, on Xæsø the Paludella squarrosa, which occurs 

 there abundantly with fruit. Leskea nervosa with fruit and Fml- 

 lania fragilifoUa. 



The other localities cited (8 — 13) surround. forming a range of 

 hills. the valley of Christiania, Nordmarken excepted. which is situated 

 behind the northern hills. All these hills represent chiefly the sili- 

 cious moss-flora. The Ekeberg (8) rises on the eastern side of 

 Chiistiania 141 m above the level of the sea. Grefsen a as and 

 Voksenaas on the northern side 364 m and 519 m, Kolsaas 

 and Skogumsaas on the western side of the Fiord 380 m and 

 545 m. Ekeberg with its sunny rocks is the favourite place of the 

 Grimmiae, Bacomitria and Anclrcaeae, at Grefsenaas are collected 

 Cynodonthim schisti, Tetraplodon angustatus and Harpanthns Floto- 

 wianus. Voksenaas excels as being the locality of Anoectangium 

 compactum, Splachnum ruhruni (found only ouce). Bry am Duvalii, 

 Brachytheciam erythrorrhizon and Mdzgeria puhescens. Heterocla- 

 dhim dimorphum grows there in the shade of pines on stones and 

 roots of trees and abounds with fruit. Behind these hills rises the 

 mountainous Nordmarken from 150 to 600 m above the level of 

 the sea. This country abounds with lakes and rivulets and the 

 annual quantity of rain is far greater there than in the lower parts 

 of the territo:y, so it is supposed to be very rich wdth mosses. 

 But from its distance from the centre it is not so well explored as the 

 nearest situated districts. The elevation above the sea creates several, 



