398 CYPERAORv*:. 



9. ISOLEPIS. Drown. Isolepis. 

 (From the Greek <j, equal, and ASTTI?, a scale.} 



Scales imbricate on all sides. Bristles none. Style 3 -cleft, 

 simple at the base, or with a minute bulb from which it sepa- 

 rates. Achenium triangular, often crowned with the base of 

 the style. 



/. capUlaris JR. fy S. : culm capillary, angular and sulcate, nearly naked; 

 leaves setaceous, much shorter than the culm ; spikes umbelled, usually 

 4, terminal, on short rays, ovoid-oblong ; scales somewhat 4-rowed, oblong, 

 obtuse. Scirpus capillaris Linn. 



Sandy fields. N. Y. and Mass, to Car. W. to Ohio. Aug., Sept. CD 

 Culms 4 8 inches high, densely cespitose. Leaves mostly radical, setaceous. 

 Spikes umbelled, somewhat quadrangular. Scales rusty brown with a green 

 keel. Hair-like Isolepis. 



10. TRICHELOSTYLIS. Lestil. Trichelostylis. 



(From the Greek rptytwy, hairy, and ffrvXos, a style ; the style being often 

 hairy. Torr. N. Y. FL) 



Scales mostly 4 8-ranked, keeled. Bristles none. Style 

 3 -cleft, more or less bulbous at the base, deciduous below the 

 bulb. Achenium triangular. 



T. mucronulata Torr. : culm compressed, ancipital ; involucre 2 3- 

 leaved, shorter than the compound spreading umbel; spikes oblong, acute ; 

 scales about 4-rowed, ovate-lanceolate, mucronate, with the points some- 

 what spreading. Scirpus autumnalis Pursh. S. mucronulatus Mich. 



Low grounds. N. Y. and Mass, to Flor. W. to Miss. July, Aug. 7|.. 

 Culms 8 12 inches high, cespitose, often spreading or decumbent. Leaves very 

 acute. Spikes solitary or 2 3 at the extremity of the rays. Scales rusty col- 

 ored, keeled. Common Trichelostylis. 



III. FuiRENE^E. Spikelets perfect. Scales imbricate on all sides. 

 Achenium until three scales or leaflets often alternating with three bris- 

 tles. Stamens 3. Style Z-cleft. 



11. FUIRENA. Rottb. Fuirena. 

 (Named in honor of G. Fuiren ; a Danish botanist.) 



Character same as that above given, 



F. squarrosa Mich. : culm obtusely triangular, sulcate ; leaves ciliate ; 

 sheaths hairy ; spikes 3 12, clustered, ovoid ; bristles none ; scales cordate 

 or ovate, unguiculate. F. squarrosa and Torretfana Beck Bot. 1st Ed, 

 F. pumila Spreng. 



Sandy swamps and bogs. N. Y. and Mass, to Geor. and Louis. Aug. % 

 Culm varying in height from 2 18 inches. Leaves smoothish or somewhat 

 hairy. Spikes 4 12 inches long, forming an irregular terminal umbel. Scales 

 hairy, with a long Blender recurved bristle. Squarrose Fuirena. 



