183 



are high and dry and very sandy, and consequently they 

 have but scanty remainder of a bog-vegetation. Investiga- 

 tions on Sylt give a similar result: the two peninsulars 

 Hörnum and List are quite covered whit sandhills separa- 

 ted by intervening sandy valleys and flats which possess 

 but very slight traces of a bog-vegetation. With the ex- 

 ception of the new formations on Romø it is probable, 

 this island would be regarded as a low heath-bog-flat, 

 which has been covered with sandhills with interjacent 

 valleys and flats offering a comparatively favourable loca- 

 lity for the bog-vegetation primary, as a rich bog-vegeta- 

 tion is found here. 



Concerning the plants belonging to the bog-vegetation 

 of the North-Frisian Islands, many of them do not exist 

 at all on the East-Frisian, for example: 



Juncus pygmœus Carex ampuUacea 



— capitatus — riparia 

 Bhynchospora alba Aira cœspitosa 



— fusca — uliginosa 



Heleocharis multicaulis Briza media 

 Scirpus cœspifosus Narthecium ossifragum 



— pauciflorus Malaxis paludosa 



■ Eriophorum latifolium Stellaria uliginosa 

 — vaginatum Drosera intermedia 

 Carex pulicaris Gentiana Pneumonanthe 



— limosa Succisa pratensis 



— Oederi et cetera ; 

 amongst these again many have ' not as yet been found on 

 the West-Frisian Islands, while they are all common in 

 West-Jutland and characteristic features in this countrys 

 vegetation. 



From the above list it will be seen, that representa- 

 tives of the deep quag (Carex limosa et c), of the swampy 

 meadows (Carex pulicaris^ Succisa pratensis et c.) and of 

 the ordinary heath-bogs are here crowded upon a small 

 and rather homogenous territory in consequense of the 

 gradual sanding up of the low and moist parts. 



