(9) 



C. Floral parts glumaceous. 

 aa. Spikelets distichous. 



1. Cyperus. Glumse oo, one or the two 

 lowermost smaller and empty. 



bb. Spikelets imbricate on all sides. 



1. Eleocharis. Perigoniar* bristles not ex- 

 serted. Caryopsis apiculate by the per- 

 sistent articulate base of the style. 



2. Fimbristylis. Perigonial bristles not 

 exserted (sometimes wanting). Caryop- 

 sis apiculate by the persistent contin- 

 uous base of the style. Aquatic. 



3. Scirpus. Perigonial bristles not exserted 

 (sometimes wanting altogether). Cary- 

 opsis apiculate by the persistent contin- 

 uous base of the style. Aquatic. 



4. Eriophorum. Perigonial bristles ex- 

 serted, considerably longer than the 

 glumae. Aquatic. 



Observation. All grasses which are rnon- 

 ogynous are put in Triandria Digynia. 



II, Digynia, 



A. Floivers glumaceous. 



a. Spikelets single 1 -flowered, imbedded in the 

 notches of the rochis, each covered by its 

 glume. 

 I* 



