42 



mark). Self-pollination may take place by the pollen falling upon 

 the stigma beneath the anthers. Even in the bud, before the 

 corolla opens the anthers dehisce and shed their pollen. In 

 the newly expanded flower shewn in Fig. 26 A the greater part 

 of the pollen had been already shed, and pollen-tetiads were 

 lying upon the stigma. Self-pollination is also assumed by 

 LiNDMAN (Central Norway). Cross-pollination by insects may 

 easily take place. Any insect which visits the flower must 

 touch the appendages of the anthers and shed the pollen and 

 become dusted with it; and as the stigma is placed just at the 

 entrance of the mouth of the corolla (Fig. 26 F, L) the insect 

 will inevitably knock against it as well. 



The visiting insects observed on the Dovre were:- Bom- 

 bus alpinus, B. agrorum, and Thrips (Lindman). 



The plant produces abundant fruit (red drupes) in West 

 Greenland, where they may keep fresh throughout the winter. 

 A seedling plant (from Denmark) is shewn in Fig. 25 G, F, H. 



Yaccinium Myrtillus L. 



Warming, 1884, p. 76, fig. 18. Lindman, 1887, 69, tab. IV, fig. 38. 

 Ekstam, 1894, p. 427. Skottsberg, 1901, pp. 11, 13. Poppids, 1903, 

 p. 42. Sylvén, 1906, I, p. 127. 



H. iMÜLLER, 1873, p. 355, fig. 133; 1881, p. 381. Schröter, 

 1904, pp. 166, 176 — 78. tab. IX. 



A dwarf shrub with erect, assimilatory shoots, and long, 

 subterranean runners which have elongated internodes, bear 

 scale-leaves, and have a straight apex (Fig. 27 A, B]. Roots, 

 hair-like and branching, spring from the axils of leaves, 

 above the axillary buds (Fig. 27^); some of the roots become 

 thicker. In course of time the runners, which branch, be- 

 come woody and as thick as goose-quills, and form annual 

 rings. They may live for more than a year beneath the surface 

 of the soil, before they bend upwards and develop into an 

 assimilatory leaf-bearing shoot (Fig. 27 C]. While the sub- 



