( 320 ) 
4, Scirpus L. Buzrosu. 
Spikelets %, o-flowered. Palets imbricate 
all round, the lowermost empty. Perigonium 
6-setaceous. Style articulate with its base. 
1. §.xacustris L. Inflorescence apparent- 
ly lateral, with a single erect involucral leaf; 
stem almost terete; bristles of perigonium 6, 
slender, with scattered barbs—2¢. Common. 
Summer. 
2. §. Tarora Kunth. Inflorescence appar- 
ently lateral, with a single erect involucral leaf; 
stem almost terete; bristles of perigonium less 
than 6, stout and retrorsely plumose.—2(. Be- 
nicia. Summer. 
3. §S. OuneyI Gray. Inflorescence appar- 
ently lateral, with a single erect involucral leaf; 
stem triquetrous.—2{. Presidio. Summer. 
4, §. maritimus L. Involucre spreading; 
spikelets large in a sessile cluster or sparingly 
umbellate.—2f. Common. Summer. 
5. §. synvaticus L. Involucre spreading; 
spikelets small in a supra-decompound inflores- 
cence.—2{. Common. Summer. 
6. S. acicunaris L. (Hleocharis R. Br.). 
Spike distichous or 38-ranked, few-flowered, 
terminating a leafless stem.—©. Common. 
Spring, 
7. §. patustris Reichenb. (Hleocharis R. 
Br.). Spike terete, o-flowered, terminating a 
leafless stem.—2f. Common. Summer. 
