230 
nerved ; flowering glume of the perfect flower ovate, 11%4 lines 
long, mucronate-pointed. Bristles 8 to 10 lines long. Remark- 
able for the broad, many-nerved, inflated glumes. 
SETARIA PAUCISETA.—Culms about 1 foot high, branched 
at the base, erect, rather rigid, compressed, leafy, the upper leaf 
enclosing the base of the panicle and equaling it; sheaths com- 
pressed and keeled, narrow, equaling or the upper longer than 
the internodes, ligule a ciliate ring, blade narrow, erect, 4 to 8 
inches long, acuminate; panicle narrow, erect, loosely flowered, 
with short mostly simple branches; rhachis and branches angu- 
lar, scabrous; bristles about twice as many as the fertile flowers; 
branches irregular, 4% to % inch long, the upper single-flowered, 
‘the lower five to ten-flowered; spikelets about 134 lines long, 
-ovate,acute, one perfect and one neutral flower, first glume less than 
half as long as the second, becoming inflated, obtuse, thin, five to 
seven-nerved; second glume about 1 % lines long, broadly ovate 
or reniform, appearing acute from its volution, thirteen to fifteen- 
nerved ; third glume ovate or oblong, seven to nine-nerved, with 
or without a palet; flowering glume ovate, slightly mucronate, 
about I line long. This and the preceding species are nearly 
allied, but well distinguished by the larger size and obtuse- 
ness of the spikelets, and the thicker and more inflated 
glumes of the former. The acute appearance of the spikelet in 
the present species depends on the folding of the outer glumes, 
as separately they are obtuse. 
AEGOPOGON GRACILIS.—Culms tufted, erect, slender, smooth, 
simple, 12 to 15 inches high; leaves mostly near the base, 1 to 
2 inches long, very narrow, the upper cauline ones half an inch 
or less, ligule short, membranaceous, with the margins prolonged, 
the upper sheaths very long, (2-214 inches); panicle racemose, 
1 to 1% inches long, composed of ten to twelve sessile, divergent 
clusters of spikelets, mostly one-sided by the twisting of the 
short alternate pedicels, the clusters consisting of one sessile and 
two short pedicelled spikelets; spikelets 2 to 3 lines long; 
empty glumes acutely three-lobed, the middle lobe extended 
into an awn; flowering glumes oblong, three-nerved, three awned, 
the lateral awns twice shorter; palet oblong, shortly two 
toothed or awned at the apex. in 
