6 
Scales of the spikelets dis- 
tant; leaves 2 mm. wide or 
less ; slender sedges 
Spikelets 4-5 mm. long 28. C. tenuis 
Spikelets 2 mm. long 
29. C. nanus 
Umbel compound 
Spikes ovoid, 8-I2 mm. 
thic 30. C. Mutisii 
Spikes long-cylindric, 5-7 
mm. thick 
31. C. ligularis 
Spikelets 15-25—flowered 
cales acute or mucronulate. 
awnless 32. C. brunneus 
Scales awned, appressed 33. C. confertus 
B. Spikelets nearly or quite terete, break- 
ing up at the nodes into I-fruited 
joints 
Spikes solitary or 2; culm filiform; 
perennial by rootstocks 
Spikes umbellate; culms stout to slen- 
er; annuals, or at least without root- 
stocks. 
Scales distant, not overlapping 
Spikes loose; spikelets yellowish- 
rown 35. C. ferax 
Spikes dense; spikelets red brown 36. C. Vahlit 
Scales overlapping 37. C. spectosus 
ype species, Cyperus esculentus, L. 
I. CYPERUS LAEVIGATUS, L. Mant. 179. 1771. 
uncellus laevigatus, Clarke in Hook. f. Fl. Brit. Ind. VI: 596. 
34. C. filiformts 
In marshes along the coast. Between Kingston and Spanish. 
Town (Fawcett 8142) ; Rockfort (Britton 787; Harris 9564.) Widely 
aia ema in warm and tropical regions both of the old world and 
the new. 
2. CYPERUS DENSUS, Link, Jahrb. III: 83. 1820 
yperus helvus, Liebm. Mex. Halvgr. 9. 1850. 
SS gined variegatus, Griseb. Fl. Br. W.I. 562. 1864. Not 
Pycreus helvus, Clarke in Urban, Symb. Ant. II: 19. 1900. — 
Frequent in marshes and ditches. Temple Hall (Harris 9392) 5 
Port Antonio (Britton 872): Stony Hill (Britton 833). Tropical 
America. 
3. CYPERUS ODORATUS, L. Sp. Pl. 46. 
yperus polystachyus, R. Br. Prodr. 214. 1810. 
Pycreus polystachyus, Beauv. Fl. d’Owar. Il: 48. 1807. 
Pycreus odoratus, Urban, Symb. Ant. IL: 164. 1900 
In marshes near the coast, in the vicinity of Port Antonio (Mar- 
ble 847; Britton 901). Not hitherto reported from Jamaica. Widely 
distributed in tropical regions. 
4. CYPERUS cmbaral rieaes Rottb. Descr. et Ic. 40. ss 3- 
ee es, Pyer ‘creus paniculatus, Nees, Linnaea, IX: 283. 1834- 
Por Reported from Jamaica by Clarke, as collected by Purdie, under 
