1018 



4. The Bo at Thorshavn; polato field hist year. Stellaria media 

 and Raniinculus repens are the conimonest species. Agrostis vulgaris, 

 Rumex acetosa, R. obtusifolius, R. domesticus, Plantago lanceolata and 

 Holcus lanatus also occurred besides a few potato piants. 



5. The Bo at Klalcsvig, Bordo; potato field last year. Gale- 

 opsis, Stellaria media and Poa trivialis are dominant; other species are 

 Alopecurus geniciilatus, Ranunculus repens, Holcus mollis, H. lanatus, 

 Rumex acetosa, Poa annua and Agrostis vulgaris. 



It will be evident from these examples, that the piants which 

 are most freqiiently dominant, are species from the weed-vegetation, 

 viz.- Stellaria media, Galeopsis, Raniinciihis repens, Poa annua, P. 

 trivialis, Alopecurus geniculatus and Cardamine hirsuta. All these 

 belong to the group of piants which make their appearance as 

 pioneers on »new land«. 



The examples show further how the dominant species of the 

 Bo formation are in process of immigration; they appear first in 

 scattered patches (see Ex. 's 1 c. and 4), and we can imagine them 

 covering more and more ground, and ousling the first arrivals. 

 The younger Bo formation (e. g. Ex. 7, p. 1012) still shows the final 

 stages of the struggle, which results invariably in the development 

 of the typical Færoese home-field, the Bo. 



