926 



rescences, no mature fruits could be found; if this be the case, the 

 plant must propagate vegetatively only. 



The other piants occurring on the sand-dune are generally the 

 same as those already recorded for the sand-strand formation, viz: 

 Elynms, Ågropijrum repens, Cakile, Honckenya, Matricaria, Potentilla 

 anserina, Agrostis siolonifera; several other species are casual mi- 

 grants from the neighbouring cultivated fieids, e. g. Taraæacum, 

 Ranunciihis repens and R. acer, Leontodon antnmnale, Plantago lan- 

 ceolata, P. maritima and Rumex domesticus. Two other species al- 

 most as characteristic as Psamma also occur on the sand-dune and 

 hardly anywhere else on the Færoes. These are Agropyrum jun- 

 ceum (which like Psamma has not been found in fruit) and Juncus 

 balticus, which here occupies its usual habitat on the sandy stretch 

 at the foot of the dune, rather than on the dune itself, 



It is thus evident, that this small isolated dune corresponds in 

 its vegetation with the dunes of western Europe except that its 

 flora is much poorer. It occupies a limited area at the head of 

 Sandsbugt while between it and the open ocean there is an exten- 

 sive, flat stretch of sand, devoid of vegetation; landwards it passes 

 gradually over into cultivated fieids, more or less sandy like the 

 dune. 



c. The salt-marsh formation. 



Small salt-marshes occur here and there within the fjords in 

 piaces where stagnant water renders the soil rtioist and humous. 

 This is the case where an embankment prevents the land-water from 

 escaping, or where soil accumulated in hollows amongst the clifFs 

 is kept moist by freshwater springs. That such piaces become salt- 

 marshes depends, however, on one condition, namely that sea-water 

 can gain access and contribute a certain amount of salt. 



The flora of these salt-marshes is made up of: 1^ species only 

 found near the ocean, i. e. halophile species; 2^ species pertain- 

 ing to bogs or other hydrophile vegetation, but which are so ac- 

 comodating in their requirements that they can grow in any soil, 

 even one containing salt, if it is moist. The characteristic piants 

 of the salt-marsh are those belonging to the first or halophile group. 



The most typically developed salt-marsh I have seen in the 

 Færoes is at the head of the Trangisvaagfjord. Here behind the 

 embankment already referred to (p. 924, Ex. 1) on the north side 

 of the stream, there is a tract agreeing precisely in appearance 



