110 MONOECIA— TRIANDRIA. Carex. 



apprehend, some of the reported places of growth of C. distcuis 

 belong. 



43. C. biiiervis. Green-ribbed Carex. 



Sheaths tubular, elongated, sliorter than the flower-stalks. 

 Fertile catkins cylindrical, distant; partly compound. 

 Scales pointed. Stem smooth. Fruit with two principal 

 ribs, 



C. binervis. Sm. Tr. of L. Soc. v. 5. 208. Fl. Br. 993. E)igl. Dot. 

 V. \8.t.l 23.-) . Willd. Sp. PL V. 4. 27 1. " Schk. Car. t. R, \; r. 

 /. 160 j" Willd. 

 C. distans. Light/. 561. 



On dry heaths, in various parts of Britain. 



Very common on the driest moors about Aberdeen, Prof. Beatiie. 

 Near Edinburgh. Mr. J. Mackay. Near Rippon. Mr. J. Brim- 

 ton. 



Perennial. June. 



Nearly twice the size of the last, notwithstanding its much more 

 dry and barren place of growth. Stern erect, firm, from 1^ to 

 near 3 feet high, bluntly triangular, and smooth, except at the 

 very top, where the angles are sharp and partly rough. Leaves 

 erect, flat, broadish, taper jiointed, ribbed, of a deep, though 

 glaucous, green ; rough at the edges, and partially so at the 

 keel ; very rough at the triangular point j their sheaths amootb, 

 about half the length of the leaf itself, or more, Bracteas like 

 the leaves, but smaller and narrower, with smooth sheaths of 

 about the same proportion ; the upper one short, though equal 

 to the ixdiiomingjloiver-stalk. The oiher Jlower- stalks wcQ\ox\gQv 

 than their sheaths, all triangular and roughish. Fertile catkins 

 3 at least, the 2 lowermost not above 3 or 4 inches asunder, in 

 which they accord with the usual proportion of other species, 

 not with C. distans ; all cylindrical, erect, blackish j often di- 

 vided, or slightly compound, at the base ; often consisting of 

 barren florets, for nearly half their length, at their summits. 

 Scales like those of the last, with similar rough awns. Barren 

 catkin mostly solitary, erect, above an inch long, cylindrical, 

 dense ; its scales very numerous, pointless, dark brown, with a 

 pale keel 5 but there are often a few barren y/ore/s at the point 

 of several fertile cafAr/Hs. Stam. 3. Stigm.3. Fr«i^ ovate, un- 

 equally triangular, a little compressed, smooth, with a short, 

 broad, deeply cloven, scarcely rough-edged, beak ; the inner 

 surface concave, paler, streaked with several equal purplish ribs ; 

 outer convex, paler, with a central prominent angle or keel, and 

 2 very distinct, elevated, smooth, green ribs towards the mar. 

 gin, though totally distinct from it, found perhaps in some other 

 species, quite unlike this, but not in any which, properly exa- 

 mined, can be confounded with it, especially C. distans. 



