127 



is not especially thickened. In the most internal cortex a few 

 bast-cells occur. 



There is only a slight trace, or none at all, of difference 

 between the spring and autumn wood. As may be seen in 

 Fig. 37 annual rings evidently occur, but it is not always easy 

 to distinguish their boundaries. 



The roots have not been investigated (Hesselman, p. 27). 



Yaccinium Myrtilhis L. (Figs, 38—39. 



Fig. 38. Vaccinium Myrtillus. 



The leaf. Cf. note p. 81. в, Stoma of the stem. 5, Hair from the margin of the leaf. 

 (•Д Tromsö; г, 4, .Stockholm.) (H.E.P.) 



