MONOCOTYLl-DOXOLS OK EXL>OGEKOUS PLAKTS. 577 



K. MONOCEPHALA, L. " Heads single, globose, compact ; 

 spikelets 1-flowered, monandrous, ovate, acuminate, the 2 

 superior scales striate, nearly smooth on the sides, serru- 

 late-ciliate on the keel, the 2 inferior minute ; nut some- 

 what orbicular; involucre 3-leaved, one of the leaves erect, 

 the others horizontal." {Torr.) — Rliizoma creeping; culms 

 1° high; head greenisli, generally inclined ; ^eai;^^ abruptly 

 pointed. Low moist lands. 



DULICHIUM, Richard. 



Spikelets linear, compressed, many-flowered; scales im- 

 bricated in 2 rows, decurrent 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. (72^/ms terete, jointed, leafy; leaves 

 numerous, 3-ranked, linear or lanceolate, short and spread- 

 ing; spikes numerous, solitary in the upper axils, simple 

 or the lower compound ; spikelets 8-14, 2-ranked, spread- 

 ing, 6-10-flowered ; scales lanceolate, many-nerved, closely 

 imbricated ; bristles nearly twice as long as the compressed 

 or concave met, 



D. SPATHACEUM, Richard. Ponds and ditches. August- 

 September. Culms l°-2° high; leaves 1'-^' long; spike- 

 lets 6"-12" long; jjedtuicles of the lower spikes longer than 

 the sheaths. 



LIPOCARPHA, R. Br. 



Spikes many-flowered, terete ; scales spatulate, imbri- 

 cated in many rows, deciduous, the lowest empty ; interior 

 scales 2, parallel to the exterior ones, membranaceous, in- 

 closing the flower and nut; stamens 1-2; style 2-3-cleft; 

 nut compressed, 3-angled; culms jointless, leafy at the 

 base ; spikes in a terminal cluster; involucre leafy. 



L. MACULATA, Torr. iVnnual; culms clustered, terete ; 

 leaves much shorter than the culm, linear, concave, smooth ; 



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