TRIANDRIA—MONOGYNIA. Rhynchospora. 51 



more or less triangular, with or without a few rough 

 bristles, shorter than its own glume, underneath. Sti/le 

 capillary, simple and without a joint at the base, deci- 

 duous. Slig7)i. 3, acute, feathery. Seed the shape of the 

 germen, hard, loose, simply pointed. 

 Moot scarcely creeping. Ste?}2s erect, rushy, round or tri- 

 angular, without joints, leafy chiefly at the base. Leaves 

 sheathing, rigid. Spikes aggregate, brownish. The bristles 

 under the germen are present or not, in species otherwise 

 so nearly akin, that they appear scarcely to mark even 

 natural sections of the genus. The same is the case in 

 Scirpus. 



1. S. 7ugricans. Black Bog-rush. 



Stem round, naked. Head roundish, abrupt, overtopped 

 by one of the two floral leaves. 



S. nigricans. Linn. Sp. PI. 64. Willd. v. 1. 261. FuhlEnum. v. 2. 

 208. FL Br. 43. Engl. Bot. v. ]G. t. ] 121. Hook. Scot. ]6. 

 Don H. Brit. 5 1 . Schracl. Germ. v. 1 . 113. 



Cyperus nigricans. M^ith. 78. 



C. n. 1347. Hall. Hist. V. 2. 181. 



Juncus leevis minor, panicula glomerata nigrlcante. RaiiSyn. 430. 



J. lithospermi semine. Magn. Monsp. 14.5. t. 144. 



J, capitatus lithospermi semine. Moris, sect. 8. 1. 10./. 28. 



Junco affinis, capitulo glomerato nigricante. Scheuchz. Agr. 349. 

 t.l.f. 12, 13, I 4. 



On turfy bogs. 



Perennial. June. 



Root of very long strong fibres, crowned with black, shining, erect, 

 folded sheaths, a few of which bear very narrow, acute, upright 

 leaves, convex beneath, and embrace the bottom of the simple, 

 rigid, otherwise naked, stem, which is from 8 to 12 inches high. 

 Head black. Anth. long, prominent, yellow. Stigm. 3, dark 

 purple. Seed white and polished, with a few narrow rough 

 scales below the base, arising from the elongated receptacle, 

 represented in Eng. jBo^.but overlooked by Vahl and Schrader. 



23. RHYNCHOSPORA. Beak-rush. 



Fahl Eyium. v. 2. 229. Br. Pr. 229. 



Nat. Grd. see ??,. 22. 



Spike of 2 or 3 perfect Jlowers, subtended by numerous, 

 gradually smaller, empty, crowded glumes. Gl. all im- 

 bricated in every direction, concave, pointed. Cor. none, 

 Filam. 1, 2 or 3. A}ith. linear, erect. Germ, superior, 



e2 



