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5. Eriophorum L. Corron-Grass. 
Spikelets ¥, a-flowered. Palets imbricate 
all round, the lowermost empty. Perigonium 
oo-setaceous, in fruit exserted, and silky.— 2, , 
1. E. aracite Koch.—San Francisco. Sum- 
mer. . 
Aquatic; formerly found in a swamp near the 
mouth of Mission creek. Not yet rediscovered 
in our neighborhood, but frequentin the higher 
Sierras. 
6. Cyperus L. 
Spikelets %. Palets imbricate, distichous, 
the lowermost empty. -Perigonium 0. Inflor- 
escence involucrate. 
1. ©. pranprus Torr. Style 2-cleft; nutlet 
lenticular, the edge turned to the rachis of the 
spikelet.—@©. San Francisco. Summer. 
2. C. aristatus Rottl. Style 3-cleft; nut- 
let triquetrous. Floret monandrous.— 2. Com- 
mon. Spring. 
Orver 5. SPADICIFLORZ. Inflorescence 
a spadix surrounded bya spathe. Bracts de- 
pauperate. Ovary superior, one to several- 
celled; cells l-ovulate. Leaves alternate with 
sheathing base. 
Family 1. TYPHACEA. 
Flowers diclinous, in asometimes interrupted 
club-shaped spadix, each division of which is 
14a 
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