388 



polystaclmwi , Carex riykla, C. rariflora and Equisetum ar- 

 vense. 



'VUe sandy part was covered wit li Dryas-hcÆi or rocky- 

 flat lormation wilh Salix <jroeiil(()idica and Pedicularis luppo- 

 nica. The bonndary line belween the Cassiope- and Drijds- 

 healh was very sliarp and went as a zigzag line upwards to the 

 sonlh-weslern corner ol' the range of hills (fig. 13|. 



The />r«/as-healh becomes, towards north, more scarce 

 and is folloved by a roi-ky-flat formation with widely separated 

 individuals, which are often very windworn (fig. W). 



Close east of the mouth of Ryders Elv on the 

 bare, by the sea partly Hooded, flat we found a very peculiar 

 vegetation. There was here a gently arched, somewhat long- 

 ish liill running parallel with the stream consisting of fine, 

 dazzling white, almost clean quartz-sand. Its surface was fur- 

 rowed by crevices of a depth of I —2 m, and of a breadth 

 of 2 — 3 m, which following the same main-direction as the 

 stream were turning and winding, now widely and distinctly se- 

 parate, now united into broad channels or round places. Be- 

 tween these, and separating them widely, were numerous, more 

 or less parallel, continuous ranges of fine sand with rather 

 steep sides. Their surfaces were covered with Salix arctica 

 and Chamœnerium latifolium, and at places, as a lesser con- 

 stituent part, Polygo}ium viviparum f. vulgaris together with 

 single tufts of Poa pratensis and Festnca rubra (fig. 15.) The 

 willow was in fruit, whereas Chamœnerium was still in rich 

 flowering bestowing on the whole of the localities a magnifi- 

 cent, reddish-purple colour, especially on the southern part of 

 the area, where the walls were highest and most pronounced. 

 The sides of the walls were closely permeated with roots, and 

 in many places these formed a protecting covering; they were, 

 as a rule, fresh with all their bark, whereas at the ends of the 

 walls, the roots were often stripped of the bark, and remnants 

 of bark-bared branches were sticking out from the sand, while 



