118 



Tacciuium Oxycoccos L, et var. microcarpum (Figs. 29 — 31.) 



Syn. Oxycoccos palustris Pers. 



Segerstedt, p. 27. O. G. Petersen, p. 81. Hesselman, 1900, p. 27. 



The specimens I have had for investigation are from the 

 following localities: — West Greenland: Godthaab (1895). Fin- 

 mark: Alten (July 7, 1885). Norway: (Finmark) Bosekop; (Dovre) 

 Vaarstien (July 13, 1887). Denmark: bog at Lyngby and Farum; 

 (Jutland) Bjærget in Thy. 



Es . 



■El. 



Fig. 29. Vaccinium Oxycoccos. 



The leaf. Cf. note, p. 81. (Denmark: Lyngby bog.) (E. Warming.) 



The leaf has no special protective devices as, for example, 

 hairs ; a wax-layer occurs only upon the lower surface. 



Both the upper and lower epidermis are very much thickened 

 with cuticle and beneath that a cuticularized layer; their cells 

 have wavy lateral walls and contain chlorophyll grains. The 

 stomata, which are confined to the lower surface, are on a level 

 with the epidermis and occur in considerable numbers relatively 

 to the size of the leaf. This should probably be connected 



