KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. NIO 3. 107 



4. Heath on sandy soil, lee side of Fox Island. There occurs, not far from 

 the sea, a large sand-field with small dunes and the sand packed härd betvveen them. 

 The vegetation is quite open. I have not seen anything like this vegetation in any 

 other place. — Pl VII: 1. 



Cop. Cliiliutrlchumdi/fusuii), boau.- Empetnim nibrum, 2 — 3 dm. liigh Juncus scheuchzerioides 



tiful specimens, densely and up to 2 m. in diaiu., Spårs. Festuca arenaria 



branched with loug, stout the finest specimens I ever Sol. Poa flahellata. 



shoots; saw; 



There has been a good deal of tussock-grass on this island in old times. With 

 its extermination, a kind of Empetrum-heath has gained groiind and has been able 

 to hold its own in spite of the sand. The is no ground stratum, and only Juncus 

 and Festuca thrive well on the shifting soil. There was a marked boundary between 

 this place and the common heath. Chiliotrichum grew here too, and it was of in- 

 terest to note the great difference between the specimens on the heath-peat and on 

 the sandy soil, for in the former place they were very stunted, the tops of the 

 branches had often died, and the young shoots were very short in comparison. 



Pl. VII: 2 represents an ^m^^e^rwm-association on mobile soil near Mt William. 

 This soil was a dry peat, that had been laid bare by cutting and was now changed 

 into what Birger (i) calls »Flughumus». After having been exposed to wind, sun 

 and rain, this peat is indeed no real peat, and Empetrum apparently thrives very 

 well. The cushions on Fox Island were of exactly the same appearance. 



The Chiliotrichum-Sissociation described above (4) is of an exceptional type. The 

 common association thus named forms a gray fringe along the streams. To attain 

 its full development, Chiliotrichum generally needs shelter and a fresh soil where 

 there is rapid circulation of water, We find real thickets of this biish in the river- 

 valleys, where it may reach a height of 2 m. 



5. Vegetation along a stream in Port Philomel, Halfway Cove. 

 The bed of the small stream is ciit deep down in the soil, a black, plastic 

 humus. 



Soc. Chiliotrichum diffusum, ca. 1 m. high. 



Grasses and herbs: 



Oxalis enneaphylla 

 Pernettya pumila (rare) 

 Ranunculus biternatus 

 Viola maculafa. 



Below the bank, near the water, Apium and Ranunculus were more frequent. 



Grcg. 



Aira ptreco.r 



Sol. 



Carex fuscula 



Spårs. 



Cerastium cul(jare 





Cerastium arvcnse 





Poa annua 





Gralium antarcticum 



Sol. 



Acmia adscendens 

 Apium gravcolens 





Nassauvia serpens (l indiv.) 



