154 CYPERACEAE 
colored: scales oval, ovate, or elliptic, 3—4 mm. long, mucronate, rather loosely 
appressed: achene obo void, ellipsoid- -obovoid, or ellipsoid, about 1.5 mm. long, 
abruptly pointed, fully A as long as the scale. [C. Ottonis Boeckl. e 
and dry sand, sea-beaches, and hammocks, Fla.—(W. I., Mez., C. A., ) 
63. C. Engelmannii Steud. Plant annual, 1-7.5 dm. tall, often tufted, bright- 
green: spikes lax, mostly Bien pd at an ends of short stalks: spikelets nar- 
rowly linear to linear-subulat —25 m E ng, less than 1 mm. wide, often 
curved, greenish-brown: s Serm ‘elliptic i ovate- ‘elliptic, 2-2.5 mm. long, blunt 
mucro os ppres he 
. lon 
eis slightly curved, acute, somewhat shorter than the scale.—Low grounds and 
mps Y ous provinees N of Coastal Plain, W Tenn. (?) to W Ark., Wis. 
Ont "Rass. p N N. Y. .; adv. in Ala. 
64. C. des L. C. Rich. Plant annual, up to 9 dm. tall, tufted or gregarious, 
bright-gre Ara rather crowded at the ends of slender stalks: spikelets 
na arrowly ine Pues mm. long or rarely WES 1-1.5 mm. wide, yellowish or 
pointed, Poe t 15 as lon ng a as the osse ue ad p sand-dunes, es low 
grounds, various b aud Fla. to Tex., Minn., Ont., and Mass.; also o the 
Pacifie Coast.— — (WF. I., Mex., C. A., 8. A., 0. W.) 
65. C. speciosus Vahl. Plant annual, 1—4.5 dm. tall, usually tufted, eee 
green: en mostly bad at the ends of the slender ers spikele let ar- 
rowly linear, 8-18 m ong or rarely longer, 1 mm. wide or less, Straight or 
nearly so, Dh or alsa wish-brown: scales ovate or elliptic. -ovate, 2-2.5 mm. 
long, mostly de rather loosely appressed: achene ellipsoid or Bud 
obovoid, 1.5-2 mm. long, abr ers pointed, fully 1 as long as the —L 
bn dii: ; , ditches, and banks, 1 Wi Fla. to Tex. s Dak., 
and Mass.; also on the Pacif. slope.—( W. I ex.) 
66. C. dcs eid 3 orton. Plant t pe erennisl, up to 20 dm. tall, gre Bu 
: ye : 
achene br Sate obovo id or eg TG pre than 1.5 mm. long, abruptly 
pointed, ‘about 14 as long as the seale.—Low grounds, swamps, and pond-mar- 
gins, various provinces, Fla. to Tex. and Calif.—(Mez.) 
5. KYLLINGA Rottb. Annual or perennial pec often tufted, herbs. 
Leaf-blades very narrow. Spikelets several or ma volucrate head, 
the involuere of 3 or more elongate bracts. Seales nosty pe or 4-ranked, the 
2 lower e a the middle one fructiferous, the upper empty or staminate. 
Perianth wanting. Stamens 1-3. Style not enlarged, decidua ous. Stigmas 
mostly 2. ree lenticular.—About 45 species, natives of warm regions.— 
Sum.—fall, or all year S. 
SORBET scales ie the spikelets with ciliate or scabrous keels, sharp- 
r firm nted. 
Achone C Dody of an ellipsoid type: plants ee 1. K. pumila. 
Achene-body of an obovate type: plants Derenn 2. K. brevifolia. 
m scales of the spikelets with smooth keels, oi or merely 
cutish. 3. K. odorata. 
1. K. pumila Michx. Annual; densely tufted, the scapes 0.5-4 dm. long, erect 
or aug leaf-blades mostly less than 2 mm. wide: braets of the involuere 
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