128 
SEGERSTEDT, p. 20. O.G. Petersen, 1901, p. 80. Maury, 1887, 
p- 105. Woopuzan, 1904 —06, pp. 387 —391. 
I have had specimens for investigation from the following 
localities: — Norway: (Finmark) Tromsö (June 6, 1884, E. W.); 
(Dovre) Vaarstien (July 15, 1887, E.W.); (Dovre) Kongsvold (July, 
1887, E.W.). Sweden: Stockholm (1888, E.W.). Denmark: 
diff. localities. 
Fig. 39. Vaccinium Myrtillus. 
Transverse section of stem. (Denmark: Ruder Hegn (wood).) >< 180. (Phot.) 
The leaf is of {the same type, both morphologically and 
anatomically, as that of the preceding and that of Arct. alpina. 
No special protective hairs occur, nor is a wax-layer present. 
The upper and lower epidermis have very thin outer walls 
and no thick cuticle nor cuticularised layer. The lateral walls 
are undulating. At the margin of the leaf and along its larger 
veins the leaf-tissue appears to be prolonged into characteristic 
