— 279 — 



A 



B 



G 

 1 



I) 



Poa neinoralis 



Fcstuca ovina 



Potentilla tormentilla 



Rumex acetosa 



Garex silvatica 



1 



1 — 

 - 23 



23 



2 — 



2 



Geophytes 



Majanthemum bifolium 



16 



4G 



231 



65 

 57 



Points . 



diageic 

 epigeic 



157 



2 

 55 



257 294 



66 100 



67 94 



Table II shows us four facies of the alder-wood. A is an ex- 

 ample of a stark locality with soil of hard peat. Aira flexuosa is 

 here about the only species to be found. It grows in large mats. 

 A few specimens are flowering. 



Here is a typical example of subformation IX of deciduous 

 forest (Under-vegetation of xerom orphous, epigeic chamæ- 

 phytes). On less dark spots, the moss-vegetation is richer, and 

 in the looser raw-humus, built up of the mosses, the Aira-vegetation 

 is mingled with Vaccinia, and a facies results, which is a transi- 

 tion between the subformations IX and VIII (Under-vegetation 

 of mesom orphous, diageic chamæphy tes). The typical 

 subformation VIII is not to be found in this island. 



By and by the peat is loosened by the roots of Aira and 

 Molinia. It begins to decompose, and then diageic herbs make 

 their entrance. G shows an example of this stage from a more 

 bright locality and for this reason more rich in species. D is from 

 a darker locality, poor in species. The end of the succession will 

 be the subformation IV (Under-vegetation of mesomorphous, 

 diageic herbs) which so often is found in forests on peat-soil, but 

 on the Notö the succession has nowhere eone so far. 



On extremely dark spots the bottom of the wood is almost quite 

 destitute of plants. The soil is covered with withered foliage. The 

 only plant that seems to be at home here, is Lastrœa dilatata, 

 which grows in vigorous but few individuals. Except this one only a 

 single specimen of Poa nemoralis, Aira flexuosa and cæspitosa, Agro- 

 stis alba, Eiibus idæus and Lysimachia vulgaris is found here and 

 there. Here reigns the subformation VI (Under-vegetation of 

 few, scattered vascular plants). 



The south-western corner, where the interior of the island 

 slopes gently to the stony shore of the lake, is the lowest part of 



