2I4 ROUND THE YEAR 



completely round, ending along the white line. The 

 proper lower surface, which bears the stomates, is 

 rolled inwards and concealed from view. Several of 

 our true Heaths have the leaves rolled in somewhat 

 the same fashion, and in the Crossleaved Heath the 



FIG. 58. Cross-section of Leaf of Crowberry, showing the rolled-up form. The 

 lower figures show one of the peculiar hairs and one of the stomates. Both are 

 confined to the inner, which is properly the under-surface. 



edges almost meet. Andromeda polifolia, the Cran- 

 berry, and certain rare British Heaths (Phyllodoce 

 coerulea, Loiseleuria procumbens] also have their leaves 

 more or less rolled backwards in the same fashion, so 

 that this seems to be a feature common, though by no 

 means universal, among moorland plants. Moorland 



