452 Key to the System of 



ACALYCEAE HYPOGYNAE. 



CYPERACEAE. 



CHORXZANDRA. 



1920. Stems slender, with indistinct transverse partitions. 



Developed leaves stem-like ; leaf -stalks slit ; base of the 

 floral leaf slightly dilated ; involucral bracts dark-colored ; 

 the two outer floral bracts keeled, all ciliolated ; the 

 innermost narrow ; stamens often about twelve ; anthers 

 red ; stigmas two ; fruit obovate-ellipsoid, towards its 

 base conical, streaked. C. enodis. 



Stems robust, with distinct transverse partitions. 



Developed leaves stem-like; leaf -stalks broad, pale and 

 shining inside, soon slit to the base ; headlets usually 

 depressed ; base of the floral leaf broadly dilated ; involu- 

 cral bracts dark-colored ; floral bracts all nearly elliptical 

 or somewhat spatular ; stamens often about twelve ; 

 stigmas two or three ; fruit blackish, suddenly pointed, 

 longitudinally and transversely streaked. 



C. cymbaria, 



OREOBOLUS. 



1921. Leaves exactly distichous. 



Leaves short, closely set, almost straight, often rather pale r 

 their stalks much broader and open ; spikelets very small, 

 solitary, axillary, on short and compressed stalks ; sepals 

 and petals minute, rigid, persistent ; style with its stigmas 

 deciduous ; fruit obovate-ellipsoid, very blunt, somewhat 

 trigonous. O. Pumilio. 



CYATHOCHAETE. 



1922. Spikelets comparatively short, few or several to each 



principal floral leaf. 



Rather or quite tall ; leaves long, some on the stems, 

 channelled, very much narrowed upwards ; panicle 

 elongated, slender-branched, hardly spreading ; spikelets 

 narrow; floral bracts brown, setular-pointed ; rudimen- 

 tary sepals and petals ciliolated towards the base ; stamens 

 and style partly exserted ; stigmas two ; fruit slender. 



C. diandra. 



