Cyperacece. 



T 3 



Nut not enclosed in a utricle (see Lipocarpha). 

 Fl. bisexual, solitary in the glumes of a simple 

 spikelet {Cyperece). 

 Glumes all distichous (see also Actinoschcemcs 

 and some sp. of Fijubristylis. 

 Rhachilla of spikelet persistent . 

 Rhachilla of spikelet disarticulating above 

 the second glume. 

 Spikelets many-fid 



i. Cyperus. 



Spikelets few-Ad. 

 Glumes all spirally imbricated, or the lower 

 only distichous. 

 Spikelets many-fid. (except Websteria). 

 Hypogynous scales or bristles o (see also 

 sp. of Scirpus and Eleocharis). 

 Style- base swollen, disarticulating from 

 the nut. 

 Glumes separable from the rhachilla 

 Glumes persistent on the rhachilla . 

 Style-base persistent on the nut . 

 Hypogynous scales or bristles present. 

 Nut with hypogynous bristles (o in 

 some sp. of Scirpus and Eleo- 

 charis). 

 Spikelets many-fid. 

 Style-base swollen 

 Style-base not swollen . 

 Spikelets i-fld. .... 



Nut with hypogynous scales. 

 Scales 3, stipitate, fiat 

 Scales 2, hyaline, wrapped round the 



nut 



Spikelets few-fid. (see also Websteria) 

 {RhynchosporecE). 

 Spikelets compressed, capitate 

 Spikelets not compressed. 



Stigmas 2 



Stigmas 3 



Spikelets panicled . 

 Spikelets fastigiate in an ovoid head 

 Fl. unisexual ; glumes containing many slender 

 scales, some with a single stamen, others 

 empty, and one central naked pistil. 

 Spikelets uniform {Hypolytrece). 



Spikelet solitary, unilateral .... 

 Spikelets many. 



Spikelets in terminal panicles . 

 Spikelets capitate on axillary scapes. 

 Nut globose, smooth .... 

 Nut deeply 6-10 grooved 

 Spikelets dimorphic, male narrow, fern, 

 broader {Scleriece). 

 Glumes entire, with one median vein . 

 Glumes trifid, with 5-7 strong veins . 

 Nut enclosed in a compressed utricle ...'.. 



Mariscus. 

 Kyllinga. 



16. 



17- 



19- 



FlMBRISTYLIS. 



ECHINOLYTRUM. 



BULBOSTYLIS. 



7- 

 8. 



9- 



Eleocharis. 



Scirpus. 



Websteria. 



10. 



Fuirena. 



11. 



Lipocarpha. 



12. 



ACTI NO SCH CENUS. 



13- 



Rhynchospora. 



14. 

 15- 



Cladium. 

 Remirea. 



Lepironia. 



Hypolytrum. 



Mapania. 

 Scirpodendron. 



Scleria. 



DlPLACRUM. 



Carex. 



