5. KYLLINGA PERUVIANA, Lam. Encyc. Ill: 366. 1789. 



Mariscus aphyllus, Vahl, Enum. II : 373. 1806. 

 Kyllinga aphylla, Kunth, Enum. II : 127. 1837. 

 Obtained in Jamaica by several collectors ; not observed by us- 



(J.P. 843). 



2. 



3- 



4- 



2. Cyperus L. Sp. PL 44. 1753. 



Style-branches 2 : achene lenticular 

 Achene dorsally flattened I. 



Achene laterally flattened 



Scales of the spikelets blunt, straw- 

 colour 

 Scales of the spikelets acute 



Scales 1.5 mm. long, dull ; inflores- 

 cence compact 



Scales 2-2.5 mm. long, shining : in- 

 florescence loose 

 Style-branches 3 ; achene turgid or trigo- 

 nous 

 A. Spikelets more or less flattened, not 

 breaking up at the nodes 

 I. Rachis of the spikelet persistent, 

 the scales falling away from it 



a. Rachis-wings none, or very nar- 

 row 

 Plants annual 

 Scales sharply acuminate 

 Scales obtusish, often with 

 purplish margins 

 Plants perennial 

 Spikelets only 1 or 2 ; culm 

 and leaves filiform 

 Spikelets several or numerous 

 Spikelets spicate, about I 

 mm. wide 

 Spikelets digitate 

 Stamens 3 or 2 



Scales acute or acumi- 

 nate ; basal leaves re- 

 duced to sheaths 

 Scales mucronate or 

 short-awned ; basal 

 leaves normal 



Leaves convolute, at 

 least in drying 



Achene narrowly 

 linear-oblong 

 Achene obovoid ; 

 culm viscid 

 Leaves flat, grass-like 



Stamen only I. 



Spikelets lanceolate to 

 oblong-lanceolate 

 Spikelets ovate, elongat 

 ing in age. 



C. laevigatus 



C. densus 



C. odoratus 

 C. paniculatus 



5- 



6. 



7- 

 8. 



C. coinpressus 

 C. sphacelatus 



C. trichodes 



C. distans 



9. C. Haspan 



10. C. oxylepis 



II. 



12. 



C. elegans 



C. diffusus 



13. C. 'ochraceus 



