CYPERACEiE. (SEDGE FAMILY.) 513 



3. K. monocephala, L. " Heads single, globose, compact ; spikelets 

 1-flowered, monandrous, ovate, acuminate, the 2 superior scales striate, nearly 

 smooth on the sides, serrulate-ciliate on the keel, the 2 infarior minute ; nut 

 somewhat orbicular ; involucre 3-loavcd, one of the leaves erect, the others hori- 

 zontjil." Torr. — Low moist places near Darien and Sunburv, Georgia. — Rhi- 

 «oma creeping Culms 1° high. Head greenish, generally inclined. Leaves 

 abruptly pointed. 



3. DULICHIUM, Kichard. 



Spikelets lineai-, compressed, many-flowered. Scales imbricated in 2 rows, 

 decurrcnt on the joints of the rachis. Perianth composed of 6 - 9 downwardly 

 hispid rigid bristles. Stamens 3. Style 2-cleft. Nut lanceolate, compressed, 

 long-beaked. — Perennial. Culms terete, jointed, leafy. Leaves numerous, 

 3-ranked, linear or lanceolate, short and spreading. Spikes numerous, solitary 

 in the upper axils, simple or the lower compound. Spikelets 8-14, 2-ranked, 

 spreading, 6 - 10-flowered. Scales lanceolate, many-nerved, closely imbricated. 

 Bristles nearly twice as long as the compressed or concave nut. 



1. D. spathaceum, Richard. —Ponds and ditches, Florida, and north- 

 ward. Aug. - Sept. — Culms 1 ° - 2° high. Leaves 1 ' - 3' long. Spikelets 6" - 

 12" long. Peduncles of the lower spikes longer than the sheaths. 



4. HEMICARPHA, Nees. 



Spikes many-flowcrcd, ovate, one or few in a terminal (apparently lateral) 

 cluster. Scales imbricated in many rows, ovate or obovate. Inner scale single, 

 behind the flower, very thin, minute. Perianth none. Stamens 1-2. Style 

 2-cleft. — Small tufted annuals with naked culms, narrow radi«al leaves, and an 

 erect mostly 1 -leaved involucre. 



1. H. subsquarrosa, Nees. Culms erect, nearly terete (2'- 4' high); 

 leaf solitary, linear-subulate, concave, smooth, shorter than the culm ; involucre 

 1 -2-leaved, the lower one erect and continuous with the culm, much longer 

 than the spikes, the other short and reflexed or wanting ; spikes 2 (rarely one), 

 seemingly lateral ; scales brown, ovate-oblong, reticulated, the sfout and greenish 

 midrib prolonged into a thick and obtuse erect point ; stamens 2 ; style deeply 

 2-parted, smooth ; nut oblong-obovate, minutely pitted in lines. — Low sandy 

 places, Florida, and northward. Aug. - Sept. — Sheaths brown. Spikes 2" -3" 

 long. 



5. LIPOCARPHA, R. Brown. 



Spikes many-flowered, terete. Scales spatulate, imbricated in many rows, 

 deciduous, the lowest empty. Interior scales 2, parallel to the exterior ones, 

 membranaceous, enclosing the flower and nut. Stamens 1-2. Style 2 -3-cleft. 

 Nut compressed, 3-anglod. — Culms jointless, leafy at the base. Spikes in a 

 terminal cluster. Involucre leafy. 



1. L. maculata, Torr. Annual; culms clustered, terete; leaves much 

 shorter than the culm, linear, concave, smooth ; involucre 2 - 6-leaved, spreading 



