54 H. M@LHOLM HANSEN 
vegetation, was met with. It is possible to distinguish between two 
formations, a Salix lanata formation on the freshly formed soil, 
and a Deschampsia cespilosa formation on somewhat older soil. In 
table 12, 1—6 show the composition of the vegetation in the two 
formations. 
Nos. 1—2 represent the Salix lanata valllendi. The soil is 
only covered with vegetation in patches, the bed of the stream 
spreading like a net over the surface from the top of the cone, the 
meshes being filled in with the patches of vegetation. The vegetation 
is remarkable by the fact that chamaephytes are comparatively do- 
minant physiognomically, especially the two Salix species, Salix 
lanata and S. phylicifolia; other Ch occur more sparingly, thus Vac- 
cinium uliginosum, Salix herbacea, S. glauca and Empetrum nigrum. 
Of other plants grasses predominate, especially Deschampsia cespitosa, 
Agrostis canina, and Festuca rubra, in less degree Festuca ovina 
and Agrostis tenuis. Of other species of more or less importance 
we may mention Polygonum viviparum, Equisetum pratense, Galium 
boreale, Viola palustris, and Carex rigida. 
Nos. 3—6 represent the Deschampsia cæspitosa valllendi. 
This formation is always found where the two formations occur 
together, behind the Salix valllendi. The deposition of material has 
practically ceased here, no bare patches of sand are ever found, and 
the soil is covered by a dense vegetation of mosses. 
The vegetation consists of a luxuriant carpet of hemicryptophytes, 
principally grasses. Physiognomically Deschampsia cespitosa is the 
dominant species; in addition Agrostis tenuis, Festuca rubra, Des- 
champsia flexuosa, Carex rigida, and Agrostis canina are abundantly 
represented. Some herbaceous plants occur in the grassy carpet, 
thus Galium boreale, and Viola palustris, and less abundantly Equi- 
setum pratense, Polygonum viviparum, and Galium verum. 
The two formations occur with the same density of species, c. 7, 
and from a biological point of view they are remarkable by their large 
number of southern plants. An essential difference between them is 
the Ch content. Possibly this difference is due to cultural influences 
such as grazing or haying. 
The Myri Vegetation, the myri jadar and the flöi vegetation. 
From considerations of space and owing to the close agreement 
between these types in Lyngdalur and at Björk, they will be treated 
later when the vegetation at Björk is dealt with. 
