G, H), consequently, the pollen-grains (Fig. 2 C) might be shed 
at that time, but we can scarcely think that this occurs until 
the flowers open and the anthers as well as the pollen-grains 
are dry. 
In the full-blown, expanded flower, the stamens are widely 
spreading (Fig. 2 À, I), and the stigma is ripe (glistening). The 
latter consists of five small protuberances seated upon the apex 
of the style which is flat and has a sharp edge (Fig. 2 D). 
Self-pollination appears rather difficult unless the wind 
transfers the pollen to the stigma; in 
this connection an important feature 
to note is undoubtedly that the 
inflorescence comprises so many 
flowers, and that they occur so 
closely together that geitonogamy may 
take place. 
Cross-pollination by insects may 
easily take place, and many kinds of 
insects are doubtless able to obtain 
the honey which is secreted abundantly 
and in large drops at the ten-lobed 
base of the ovary (Fig. 2 E), and is 
retained by the hairs which occur upon 
the basal parts of the stamens. In Fig. 3. Ledum palustre. 
Greenland Ledum palustre var. decum- (From West Greenland.) 
Ripe capsule in natural position. 
bens is visited by Argynnis chariclea 
Herbst; but in a garden near Copenhagen I have seen dead or 
dying individuals of three kinds of flies (most frequently Empis 
chioptera Fall., then Rhamphomyia hybrida Zett., and a species 
of Microphorus (velutinus?) adhering to it by their wings and 
legs; the cause of death is unknown; the strong perfume appears to 
stupefy them. Porrius observed a number of insect-visitors (1. c.). 
The ovary is covered with two kinds of hairs, viz. small, 
shiny, pearl-like glandular hairs, and setaceous hairs (Fig. 2). 
