386 Norivay and the No7"wegians 



Undid (Tender Gentian) in Salten. On the shores are 

 also found some of the species of the rubble-slope and 

 of the Silurian formation. 



Several uncommon species occur in sandy and 

 gravelly river-banks, such as Vahlbergella affinis on 

 the banks of the Alten river ; Arabis 'petraea (Alpine 

 Eock-cress) on the river-banks in Sogn ; and in other 

 places, Hii^ipoiiliae, rliamnoides (Sea Buckthorn), Myri- 

 caria Germanica (German Myrtle), Salix daphnoides 

 (Laurel Willow), etc. 



We see, therefore, that the physical condition of the 

 substratum, as well as the climate, exercises great in- 

 fluence on the distribution of plants in Norway. 

 Generally speaking, the flora of the western parts 

 resembles that of the Scottish Highlands, whilst that 

 of the mountains, besides consisting of the greater 

 number of alpine flowers to be found in Switzerland, is 

 rich in Arctic species. 



Pakt III. 



Description of Flowers. 



Amongst the numerous interesting and beautiful 

 flowers found in Norway, it is most difficult to select a 

 limited number for description. A preference has been 

 given to those peculiar to Norway, and to alpine flowers 

 found also in the mountainous parts of Switzerland, 

 but the number described is necessarily limited. They 

 are arranged according to the colour of their corollas. 

 The reason why figures are prefixed is explained in 

 Part II. 



