Scirpus.] 



Cyperacetz. 



73 



down the middle, rhachilla slender, prominently scarred ; 

 glumes loosely imbricate, | in. long, oblong or narrowly 

 oblong, obtuse, rather coriaceous, easily detached, tip hyaline; 

 bristles 6, much longer than the nut, stout, densely retrorsely 

 spinulose, red-brown ; anth. obtusely apiculate ; nut T V in. long, 

 shortly obovoid, trigonous, base narrowed, smooth, yellowish, 

 style very short, base obpyriform, nearly as broad as the 

 nut, to which it is attached by a point, stigmas 3, long. 



Montane zone, at about 4000 ft.; rare. Ramboda; Uva. Fl. Dec, 

 April. 



Also in the Indian mountains, E. Asia, and Australia. 



8. SCIRPUS, L. 



Glabrous herbs of various habit, often very tall, leafless or 

 leafy at the base only (all along the stem in S.fluitans) ; stem 

 terete, trigonous, or triquetrous; infl. terminal or lateral, of 

 clusters or umbels of oblong or ovoid, many-fld., terete, ses- 

 sile, or pedicelled spikelets (spikelets solitary in 6". fluitans) ; 

 glumes spirally imbricating round a stout or slender rhachilla, 

 lowest two and a few uppermost empty, hypogynous bristles o, 

 or 2—7, retrorsely scabrid, or (S. littoralis) plumose; stam. 1-3, 

 anth. linear; nut obovoid, trigonous, or biconvex, smooth or 

 nearly so; style slender, base not broadly dilated, leaving no 

 button on the nut; stigmas 2 or 3, slender. — Sp. about 125; 

 26 in FL B. Ind. 



Stem leafy throughout, spikelets solitary- 

 Stem leafy at the base only or leafless. 

 Spikelets sessile, fascicled. 

 Annuals. 



Glumes squarrosely recurved 

 Glumes not squarrose. 



Nut wrinkled .... 

 Nut smooth .... 

 Perennials. 



Stem septate within 

 Stem not septate. 



Spikelets in lateral clusters 

 Spikelets in terminal clusters . 

 Spikelets in corymbiform umbels. 

 Umbels terminal, bracteate 

 Umbels lateral, ebracteate 



S. fluitans, L. Sp. PL 48 (1753). 



I. S. FLUITANS. 



2. S. SQUARROSUS. 



3. S. SUP1NUS. 



4. S. ERECTUS. 



5. S. ART1CULATUS. 



6. S. MUCRONATUS. 



7. S. SUBCAPITATUS. 



8. S. GROSSUS. 



9. S. LITTORALIS. 



Thw. Enum. 350. 

 C. P. 835 



Eleonton 



Moon, Cat. 6. Isolepis fluitans, Br. 

 .curvuLus, Nees in Wight, Contrib. no. 



Fl. B. Ind. vi. 653. Reichb. Ic. FJ. Germ. t. 298 (excl. nut). 



A slender, annual, glabrous aquatic, often forming large 

 floating masses, root-fibres slender; stems 6-18 in., tufted, 



