(9) 



C. Floral parts glumaceous. 



aa. Spikelets dlsticJwus. 



1. Cyperus. — Gluracie oo, one or the two 

 lowermost smaller and empty. 



bb. Spikelets imbricate on all sides. 



1. Eleocharis. — Perigouial 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 

 glumsB. Aquatic. 



Observation. — All grasses which are mon- 

 ogynous are put in Triandria Digynia. 



II. Digynia. 



A. Flowers gliunaceous. 



a. Spikelets single 1-flowered, imbedded in the 

 notches of the rach is, each covered by its 

 glume. 

 1^ 



