392 THE STORY OF PLANT LIFE 



It flowers in June and July, and is a herbaceous 

 perennial. 



As in most, if not all, of the Glumaceae, the flowers 

 are pollinated by the wind. The stigmas ripen in 

 advance of the anthers. 



The fruit is an achene, which falls, when ripe, near 

 the parent stock. 



Bog-rush, Clock-seaves, Lawk, Ling, Black Beak- 

 rush are the only names for this plant. 



ScHCENUS NIGRICANS. — In Fig. 109 note the rush- 

 like stems with few short leaves, the terminal flowers, 

 and the bristle-like bracts longer than the spikes. 



KoBRESiA {Kobresia caricina). 



This plant is named in honour of M. de Kobres, of 

 Augsburg, who was a supporter of botanical research. 

 The second Latin name indicates the sedge-like 

 habit. 



In Britain this plant is very rare, being restricted 

 to a few counties in the north of England and 

 Scotland, York, Durham, Westmorland, Argyll and 

 Perth, where it grows at an elevation of 2500 ft. 



Upland moors, alpine marshes, and wet places in 

 general form the habitat of this local species, which 

 is found only in upland moors at considerable alti- 

 tudes where the atmosphere is moist and humid. 



In habit it is sedge-like and densely tufted like the 

 last. The rootstock is short. The plant is of low 



