573 
GRAMINEJE. (GRASS FAMILY.) 
54. Setaria. Spikelets spiked-panicled, the peduncles bearing lat¬ 
eral bristles : otherwise as No. 53. 
o5. Cenchrus. Spikelets inclosed l -5 together in a hard and spiny 
globular involucre, like a burr. 
Tribe 8. SACCHARE^E. — Fertile palere membranaceous or sca- 
rious, always of thinner and more delicate texture than the 
(often indurated) glumes, frequently awned from the tip. 
Spikelets usually in pairs or threes, panicled or spiked, some 
of them entirely sterile (heterogamous). 
* Spikelets monoecious, imbedded in the separable joints of the spike. 
56. Tripsacum. Staminate spikelets above, in pairs at each joint: 
pistillate single in each joint: glumes indurated. 
* * Fertile spikelets with one perfect and one sterile (staminate or 
mostly neutral) flower : lower palea of the perf. fl. awned. 
57. Erianthus. Both spikelets at each joint of the rachis alike fer¬ 
tile, involucrate with a silky tuft: otherwise as No. 58. 
58. Andropogon. Spikelets 2 at each joint of the plumose-hairy 
spikes, one of them sessile and fertile; the other pediceiled 
and sterile or rudimentary. 
59. Sorghum. Spikelets in open panicles, 2-3 together, the lateral 
ones sterile or reduced to mere pedicels. 
» 
1* LEERSIA, Solander. False Rice. White Grass. 
Spikelets 1-flowered, perfect, flat, disposed in one sided pani¬ 
cled racemes, jointed with the short pedicels. Glumes wanting. 
Paleae chartaceous, compressed-boat-shaped, awnless, bristly-ciliate 
on the keels, closed, nearly equal in length, but the lower much 
broader, inclosing the flat grain. Stamens 1-6. Stigmas feath¬ 
ery, the hairs branching. — Perennial marsh grasses : the flat 
leaves, sheaths, &c., rough upwards, being clothed with very mi¬ 
nute hooked prickles. (Named after Leers , a German botanist.) 
1- L. oryzoides, Swartz. (Rice Cut-grass.) Panicle dif¬ 
fusely branched , often sheathed at the base ; fiowers 3 -androus, ellipti¬ 
cal ; paleae strongly bristly-ciliate (whitish). — Wet places, common. 
2. Li. Virgillica, Wilid. (White Grass.) Panicle simple; 
the flowers closely oppressed and somewhat imbricated on the sleuder 
branches around which they are partly curved, oblong, 2 -androus (a 
third stamen imperfect or wanting); paleae sparingly ciliate (greenish- 
white, ip' long, smaller than in the last). — Wet woods, &c. Aug. 
2. ZIZANIA, Gronov. Water or Indian Rice. 
Flowers monoecious, the staminate and pistillate in 1-flowered 
