400 



tops and sides. StelUiria longipes once in a while grew among 

 the Salices on these sandhills (Fig. 24). 



Sand-drift grounds. In many places were small, low 

 downs of while drift-sand. The "living" downs were often 

 quite devoid of any vegetation. On flats with lively sand-drift 



Fig. 23. Polygonum vivi2)arum,sand-dnîl grounds. Klitdalen. Del. H. Olrik. 



were noted: very luxuriant, decumbent hushes of Salix arctica v., 

 Chamaenerkim latifolium^ Dryas with erect branches and with 

 only the ends of the branches above the sand (Fig. 21 — 22), 

 Folygoniim viviparum^ the rhizomas of which were, in such 

 localities, often lengthy and erect (Fig. 23), Festuca rubra, very 

 vigorous, most often a form with hairy spikelets, Arahis arenicola, 

 Arenaria ciliata (not common). Wherever the sand was a 

 little more moist Equisetum arvense (the decumbent form) was 



