83 



There is probably no other difference between the Danish 

 Fir. rotundifolia and the Greenland grandiflora form than 

 the one mentioned above. 



Pirola minor L. (Fig. 2.) 



Warming, 1897, p. 103. Stenström, 1895, p. 137 (cf. fig.). 

 Finmark: Alten. Faroes: Bordö. 



Fig. 2. Pirola minor. 



1, Leaf in transverse section. 2, The mesophyll near the epidermis of the upper surface. 

 3, The epidermis of the upper, 4, of the lower surface (Finmark). (H. E. P.) 



The leaf resembles in its main points that of Pir. grandi- 

 flora. As differences of importance may be mentioned that 

 stomata occur on the upper surface of the leaf, but are fewer 

 in number than those of the lower surface, and are slightly 



