Scrophulariaceae. 



373 



does not at any rate belong to the real snow-flora. In the 

 Scoresby-Sound-district it is found "in particularly well 

 sheltered luxuriant, humid, herby slopes with high snow- 

 cover in winter," but here it is very rare (Kruuse, 1905, 

 p. 175). In the Angmagsalik district, where it is somewhat 

 more common (Kruuse, 1906, p. 248), besides growing on 

 the herby-slopes, it is 

 also noted from the 

 "steps of steep rocks 

 above the slopes." Ac- 

 cording to Norman, 

 in Northern Norway 

 the species is found 

 on all kinds of stony 

 substrata rather than 

 on grassy ground, and 

 "it very much prefers 

 the sunny side, especi- 

 ally the side facing 

 directly south, and 

 occurs only very rarely 



on the indifferent 

 (eastern and western) 

 sides". In the Alps 

 it is recorded from 



"Schneeblössen" (Schröter, p. 656), spots where the wind 

 sweeps the snow away in winter time. 



Anatomy. The Root. The epidermis of the adventi- 

 tious roots dies away early; the outermost layer of the cortex 

 is developed as an exodermis with cuticularised walls. Even 

 before any secondary growth has taken place in the stele, 

 a cork-cambium is developed in the layer under the exo- 

 dermis, which is instrumental in the formation of a few- 



Fig. 2. Veronica fruticans. 



Transverse section of an adventitious root 



■{about 23o/^)_ (Greenland.) 



