Cyperus.] Cyperacece. 1 7 



less corymbed, spikelets sometimes very shortly spicate, stigmas 

 capillary. 



A. Rhachilla of spikelets not much winged ; 1. and bracts long. 

 Sect. 1. Compressi. Annuals or biennials; 14, compressus 



(31); 15, aristatus (14); 16, Iria (2). 

 Sect. 2. Rootstock becoming woody, stolons frequent (large 

 or middle-sized) ; 17, distans (26); 18, nutans (27); 19, eleu- 

 sinoides (37); 20, pilosus (28); 21, procerus (32). 



B. Rhachilla of spikelets usually conspicuously winged. 



Sect. 3. Bidbosi. Stolons slender, soon disappearing, termi- 

 nating in tunicated bulbils ; 22, bulbosus (11). 



Sect. 4. Brevifoliati. Tall ; stolons long, hardening into 

 creeping rootstocks ; 1. short, rarely half the length of stem ; 

 glumes approximate, closely imbricate ; 23, articulatus (23) ; 

 24, corymbosus (24). 



Sect. 5. Subimbricati. Tall ; rootstock very short, woody, 

 stolons o ; glumes scarcely imbricating in frt. ; 25, C. tegetum, 

 (25 C. dehiscens) ; 26, Zollingeri (32). 



Sect. 6. Rotimdi. Tall or medium plants, stoloniferous or 

 rootstock woody ; 1. and bracts long ; rhachilla of spikelets 

 winged ; glumes closely imbricated ; 27, C. rotundus (34) ; 

 28, C. stoloniferus (35) ; 29, C. tuberosus (30). 



Sect. 7. Exaltati. Tall, stolons o ; 1. and bracts long ; umbel 

 large, compound, spikes and spikelets many, rhachilla con- 

 spicuously winged; anth. apiculate, sometimes crested; style 

 and stigmas bmall ; nut small, ashy black ; 30, C. exaltatus 

 (29); 31, C. digitatus (36); 32, C. platyphyllus (38). 



1. C. Cephalotes, Vahl, Ennm. ii. 311 (1806). 

 C. Hookeriamis, Thw. Enum. 342. C. P. 3221. 

 Fl. B. Ind. vi. 597. Rheede, Hort. Mai. xii. t. 53. 



An annual (?) marsh herb, with slender stolons; stem 

 rather stiff, 6-10 in., trigonous; 1. longer or shorter than the 

 stem, narrowly linear, acuminate, striate, erect, \ in. broad, 

 rather coriaceous, i-veined ; head globose, \ in. diam., of many- 

 small sessile spikelets; bracts 3-4, leaf-like, striate, widely- 

 spreading, base a little dilated ; spikelets ovate, \-\ by \ in., 

 flat, 20-30-fld., rhachilla stout, not winged; glumes ovate- 

 oblong, cuspidate, cymbiform, closely imbricate, coriaceous, 

 chestnut-brown, many and closely veined, keel suberulous, 

 margin and tip narrowly hyaline; stam. 2-3, fil. broadly 

 linear, anth. linear, ? V in. ; nut oblong, narrowed into a subu- 

 late beak half as long as itself or more, obscurely trigonous, 

 ventrally concave, dorsally convex, pale and corky in the 

 lower half, brown above it, style jointed on the beak of the 

 nut, capillary, entire or 2-3-toothed. 



Moist region, very rare. Galle, Kornagalle, Lunugala, Uva. Fl 

 ; Sept., &c. 



Also in India, Burma, China, Malaya, Australia. 

 Resembles 'Kyllinga monocephala. 



PART V. C 



