288- North American Cyperacea:- 



Tribe IL HYPOLYTREiE. 



Flowers perfect. Scales (bracteae,) of the spike imbrf-- 

 oated on aH sides. Spikelets several-fiovvered, composed' 

 of many distichous scales (squamulae) ; or one-flowered with- 

 fiew scales placed in a valvate or circular order, and no peri- 

 gynium; or one-flowered wi^th' a petaloid perigynium (perianth)^ 

 and no scales. 



5. LIPOCARPHA, R.Brown. 



Scales of the spike imbricated on all sides, coriaceous^ 

 Spikelets oblong, composed of two squamulae (perianthiurar, 

 N. ah E.) parallel with the scale ; one of them fertile, one- 

 flowered, the other abortive. Perigynium wanting. — Habit 

 of Kyllingia; heads compact, clustered. 



Lipocarpha, R. Brown,* fide N. ob Esenh. in Wight's con. 

 trib. p. 70, and in Limicea, p^ 287. 



Species of Hypolytrum^ Richard, Kunth, Vahl, and others. 



Species of Kyllingia, Michaiix. 



The genus Lipocarpha differs from Hypolytrum chiefly in the 

 position of the squamulae of the spikelet. In the latter, they 

 are contrary to the scale, in the former they are inserted 

 ^parallel with the scale, one of them (the inferior,) being 

 placed immediately behind the nut, and the other between the 

 nut and the scale. 



Lipocarpha maculata. 



Spikes 3 — 5, ovate, acute; scales cuneiform-rhombic, acute, 

 narrowed at the base, spotted ; spikelet shorter than the scale ; 

 sqjaamulse lanceolate, the interior chartaceous; the exterior 

 membranaceous, convolute ; stamen solitary ; style 2-parted ; 

 nut obscurely 3-sided; leaves narrow; involucre somewhat 

 two-leaved; culm triangular. 



* I am unable to quote the worli in which Mr. Brown published this 

 genus. 



