(321) 



5t Eriophorum L. COTTON-GRASS. 



Hpikelets $ , co-flowered. Palets imbricate 

 all round, the lowermost empty. Perigonium 

 oo-setaceous, in fruit exserted, and silky. 1C. 



1. E. GEACILE Koch. San Francisco. Sum- 

 mer. 



Aquatic ; formerly found in a swamp near the 

 mouth of Mission creek. Not yet rediscovered 

 in our neighborhood, but frequent in the higher 



Sierras. 



6. Cyperus L 



Spikelets $ . Palets imbricate, distichous, 

 the lowermost empty. Perigonium 0. Inflor- 

 escence involucrate. 



1. C. DIANDRUS Torr. Style 2-cleft; nutlet 

 lenticular, the edge turned to the rachis of the 

 spikelet. 0. San Francisco. Summer. 



2. C. ARISTATUS Kottl. Style 3-cleft; nut- 

 let triquetrous. Floret monandrous. It. Com- 

 mon. Spring. 



ORDERS. SPADICIFLORE. Inflorescence 

 a spadix surrounded by a spathe. Bracts de- 

 pauperate. Ovary superior, one to several- 

 celled; cells 1-ovulate. Leaves alternate with 

 sheathing base. 



Family 1. TYPHACE^l, 



Flowers diclinous, in a sometimes interrupted 

 club-shaped spadix, each division of which is 

 HA 



