166 THE STORY OF PLANT LIFE 
Fens, but as it was used largely for rheumatism it may 
have occurred there, and become extinct since, as it 
has in other places from the same reason. Drainage 
also has caused its disappearance in other parts. In 
the Lake District it is found at an altitude of 1800 ft. 
Its chief habitat is a bog, where there is a layer of 
peat and moist conditions. It is also found in damp 
places at the sides of pools, in wet meadows by the 
banks of streams, as well as in true bogs. 
The stem is decumbent, the root adventitious. The 
stem is a flowering stem. The leaves are stalked, 
and bear three sessile, ovate leaflets which are sinuous 
witha smooth margin. It istrifoliate. The petioles 
are sheathed at the base, terete or round and striate. 
The flowers are pink in bud, and become white 
later, the feathery corolla giving them this appear- 
ance. The scapes are simple, leafless, erect or 
decumbent, ascending, longer than the leaves. The 
terminal flowers have broad, obtuse bracts and 
are racemose, originating opposite a leaf from the 
sheathing leaf-bases. 
The calyx is tubular, the sepals obtuse. The 
corolla is funnel-shaped and filiform. Bog Bean is 
about a foot in height. It flowers in July, but the 
plant does not always flower. 
It is dimorphic, having long- and short-styled forms. 
Fruit is seldom matured. The corolla is half cam- 
panulate, half funnel-shaped. The tube is thick and 
grooved. It is protected from flies by being reflexed 
and bearded within. The stamens are situated on 
