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-tetrads were 
lying upon the stigma. Self-pollination is also assumed by 
Linpman (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 (Linpmani. 
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. 
Vaccinium Myrtillus L. 
Warmine, 1884, p. 76, fig. 18. Linpman, 1887, 69, tab. IV, fig. 38. 
Egsram, 1894, p. 427. Skorrsperc, 1901, pp. 11, 13. Porrius, 1903, 
p. 42. Svyzvén, 1906, I, p. 127. 
H. MüLzer, 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, D). Roots, 
hair-like and branching, spring from the axils of leaves, 
above the axillary buds (Fig. 27 A); 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- 
