GREEN-RIBBED SEDGE 



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Green-ribbed Sedge (Carex binervis, Sm.) 



This tall, graceful sedge is found in the North Temperate Zone in 

 W. Europe, N. Asia, and N. Africa. It is not found in any early 

 plant-beds. It is found in all parts of Great Britain, except Northants, 

 Glamorgan, Notts, S.E. Yorks, Linlithgow; as far north as the Shet- 

 lands, up to 3200 ft. in the 

 Highlands, and in Ireland. 



The Green-ribbed Sedge 

 is an ericetal species found 

 in dry habitats, and it grows 

 in upland stations on the 

 borders of woods, on stony 

 hills, on heaths and moors, 

 as well as in fields, in wood- 

 land districts, and on sandy 

 soil by the roadside, up to 

 high elevations. 



This is a tall, erect, fin- 

 ally drooping plant, with a 

 slender, graceful stem, with 

 a creeping rootstock. The 

 stems are 3-angled,' smooth, 

 with numerous leaves, which 

 are not very long, rigid, 

 keeled, and curved back, flat. 

 The bracts are leaflike. 



The spikes are stalked, 

 cylindrical, distant, and the 

 male and female are on dif- 

 ferent stems. The male flowers are solitary, the female are short, 

 stalkless, or nearly so, distant, the lower ones stalked, the upper 

 included. The sheaths are not so long as the flower- stalk. The 

 spikes are cylindrical, with perigynia with green ribs, and 3-angled, 

 longer than the glumes, which are oblong and compound. The beak 

 is rough along the margin, and divided into two nearly to the base. 

 The nut is rough and inversely egg-shaped. 



This sedge is 1-2 ft. high. The flowers are in bloom in June. The 

 plant is a perennial, propagated by division of the rootstock. 



The floral mechanism is that typical of sedges with more numerous 



GREEN-RIBBED SEDGE (Carex binervis, Sm.) 



