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this case the heath-vegetation, but they can subsist long- 

 after the disappearance of the wood and perhaps they are 

 also able to adapt themselves to altered circumstances, 

 while others if not directly connected with the wood prefer - 

 to live in proximity with it. On the North-Frisian Islands 

 I have found some such plants some of which may have 

 been introduced: 



Ophioglossum viilgatwn Epilohium montanuni 

 Lastrea Filix mas Aegopodium Podagraria 



Blechnum spicant Chaerophyllum tèmtdum 



Milium effusum TrientaUs europaea 



Avena elatior Solanum Dulcamara 



Melandrmm diurnum Verbascum nigrum 



Hypericum pidchrum Glechoma hederaceum' 



Malva moschata Gidium Mollugo 



Geum urbanum Lampsana communis 



Lathyrus pratensis Scorzonera humilis. 



All these plants however are very scarce and many- 

 of them shelter themselves under the lee of the towns. 



We may arrange the leading features of the vegetation 

 of the North- Frisian Islands in the following manner: Be- 

 sides the almost effaced traces of a wood-vegetation we 

 find .on the drift a vegetation which is mainly the same as 

 that on the drift in West-Jutland. A marsh- vegetation 

 which in some locahties is almost dwarfed on account of 

 the sanding up. A sandhill-vegetation as deficient in spe- 

 cies as that of the Jutland sandhills but nevertheless strong 

 and flowrishing, and finally a bog-vegetation on the wane, 

 which consequently produces very interesting' dwarf-forms. 

 Everywhere we can trace a connection with West-Jutland, 

 and therefore come to the conclusion, that the eastern and 

 southern coasts of the Northsea separate themselves into a 

 northern and a southern territory with the mouth of the 

 Elb as a boundary between them. 



