MOORLAND PLANTS 



215 



plants which are not Heaths or Crowberries occasion- 

 ally roll up their leaves. A certain Grass (Nardus 

 slricta) which forms close tufts of fine, wiry, grey 



FIG. 59. Cross-leaved Heath {Erica, tetralix). a, a flowering branch ; b, p 

 ditto, magnified ; c, a leaf seen from the under-side ; rf, section of leaf. 



leaves, is one of these, and its leaves look wiry or 

 even bristle-like, because they are rolled into slender 

 and rather stiff hollow cylinders. 



This contrivance of leaf-rolling seems to be intended 



