388 



Fr. J. Mathiesen. 



circles inside their outlines indicate the connection of the 

 stalk of the gland with the outer wall of the cell), the lateral 

 walls of the others are seen to be porose with nodose thick- 

 eningsjbetween the pores; in the main form I found these 

 thickenings to be somewhat more strongly developed; they 

 were very pronounced in individuals collected in dry habitats 

 in Denmark. A transverse section of the leaf is shown in 



Fig. 10. Veronica officinalis L. 



f. glabrata Fristedt. 



A, Epidermis of the lower, and B of the upper surface of the'^leaf. C, 



Epidermal cells from the upper surface of the leaf, more highly magni- 



fied. D, Transverse section of the leaf. [A and B about ^"Z^; C about 



225/^; D about "5/i)- (Kirkebokamp, Stromo (The Færoes)). 



Fig. 10, D\ in the upper part of the figure there are two 

 layers of short and broad palisade-cells; the spongy paren- 

 chyma consists of rounded or slightly branched cells. Any 

 special difference in the structure of the mesophyll in the 

 Færoese and the Danish piants, could hardly be demonstrated ; 

 the description given by Koch (1895, p. 134) also agrees 

 with that given above. 



