^8^ North American Cxfperacea'.- 
Tribe II. HYPOLYTRE^E. 
Flowers perfect. Scales (bractese,) of the spike imbn- 
eated on all sides. Spikelets several-flowered, composed' 
of many distichous scales (squamulae) ; or one-flowered with- 
few scales placed in a valvate or circular order, and no peri- 
gynium ; or one-flowered with a petaloid perigjnium (perianth), 
and no scales. 
5. LIPOCARPHA, R, Brown. 
Scales of the spike imbricated on all sides, coriaceous. 
Spikelets oblong, composed of two squamulas (perianthium, 
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. ah Esenh. in Wight's con, 
trib. p. 70, and iii Linnaa, p, 287. 
Species of Hypolytrum, Richard, Kunth, Vahl, and others. 
Species of Kyllingia, Michaux. 
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 ; 
squamulae lanceolate, the interior chartaceous; the exterior 
membranaceous, convolute ; stamen soHtary ; style 2-parted ; 
nut obscurely 3-sided ; leaves narrow ; involucre somewhat 
two-leaved; culm triangular. 
* I am unable to quote the work in wliich Mr. Brown published this 
genus. 
