925 



b. The sand-dune (Klit) formation. 

 At onl}' one place on the Færoes has sand l)een washed ashore 

 in sufficient quantity to form, with the assistance of the wind, a 

 typical dune. The material deposited here is basalt-sand similar 

 to that of the sandy strands, but somewhat finer in texture. This 

 dune is tlierefore dark grey, not whitish like the quarlz-sand dunes 

 along tlie western coast of Europe. It is noteworthy however, tliat 



Fig. 174. On the dune at Sandsbugt on Sando. The vegetation consists chiefly of Psamma with low 

 patches of Honckenga. (From photo. by E. Warming). 



the dominant species of this one dune at tlie head of Sandsbugt 

 on Sando (Fig. 174) is tlie same as that on the dunes of the western 

 Europe, namely Psamma arenaria (Psamma association). This 

 very conspicuous plant has been found on the Færoes only in this sta- 

 tion, and one may almost assume that it occurs in no other piaces. 

 That Psamma is adapted in a special degree for life on the dunes is 

 well knowai, and this has been confirmed by F. Buchenau (1889) 

 and E. Warming (1891) with regard to the shores of the North-Sea. 

 The form found on the Færoes does not seem to differ in any re- 

 spect from the typical species, but, as already mentioned, it does 

 not appear to bear any fruit. I examined many piants during the 

 last days of August 1897, and although there were numerous inflo- 



