Somevs:] CYPERACEX. 359 
Bristles 0. 
Glumes 4 in. long or longer. 
Glumes acute, not or scarcely keeled 3. 9. articulatus. 
Glumes mucronate, keeled. 
Glumes smooth, nut y; in. long . 4. S. supinus. 
Glumes multistriate, nut yy in. long 5. 9. Roylei. 
Glumes yy in. long with a cusp of the 
same length . d ‘ , 6. S. squarrosus. 
Clusters terminal]. 7 
Perennial, style 3-fid 7. S. kyllingoides. 
Annual, style 2-fid 8, 8 
. Michelianus, 
Spikelets many stalked or umbelled (sometimes 
reduced in litoralis and maritimus). 
Umbels lateral, the lowest bract erect 
appearing as a continuation of the stem 
but sometimes short. 
Bristles soft, linear, plumose . . . 9. S. litoralis. 
Bristles harsh, retrosely scabrid . . 10. S. lacustris. 
Umbels terminal, bracts leafy. 
Umbels not decompound, spikelets few or 
many, rather large . , ; - ll. S. maritimus, 
Umbels decompound, spikelets very num- 
erous and small ‘ : : . 12. S. chinensis, 
1. S. erectus, Poir, Hncyc. vi (1804), 761; F. B. I. vi, 656; 
Prain, Beng. Pl. 1160. 
Roots fibrous. Stems 4-15 in. high, terete, tufted, sheaths with an 
oblique mouth, somttimes produced in a short erect blade. Spike. 
lets 1-3 in a single lateral head near the apex of the stem. 4-4 in, 
long. Glumes , in. long, broadly ovate, acute, concave, keel not 
very prominent. Bristles 5-6, retrorsely scabrid (rarely 0, C. B, 
Clarke). Style usually 2-fid. Nut 73 in. long, plano-convex, broadly 
obovoid, apiculate, slightly transversely undulate, straw-colored, 
brown, ashy-grey, finally usually nearly black. 
Dehra Dun (Parker) Bahraich (Imayat). A weed of rice fields. 
Distris. Throughoht India, temperate Asia, N. America, Australia, 
2. §. mucronatus, Linn. Sp. Pl. (1753), 50; F, B, I. vi, 657; 
Prain, Beng. Pil. 1161 ; Collett, Fl, Siml, 564, 
