36 
The corolla is urceolate, white or whitish-green (Fig. 24): 
its length is 5 to 6mm.; and its breadth at the base 5 mm.; 
Fig. 24. Arctostaphylos alpina. 
A, B, A flower seen from the outside and in longitudinal section; the pollen has already 
fallen out of the anthers though they have but just opened (5/1). C, An anther of the 
flower in question; the appendages absent. D, Longitudinal section through a flower with 
rather short style: pollen grains adhere to the hairs of the inner surface of the corolla 
(as in B and X). E, F, G, Anthers and stamens in different positions and of different ages 
(%/1). H, J, The anthers from a bud (2/1). KA, Longitudinal section through a flower with 
long style. Z, The limb and the throat of the flower seen from above; in the throat the 
stigma may be seen (breadth of limb about 2!/2mm.; width of throat 1 mm.). M, pollen 
tetrad. (E. W., 1886.) 
at the limb 2°5 to 3 mm.; the width of its throat is 1 mm. 
The interior of the corolla is covered with erect hairs extending 
as far as to the margin of the limb (Fig. 24 D, B, K). The 
