494 
empty glumes and pedicel thinly bearded; awn nearly straight, 1 to 2 em. long.— 
Near the coast. 
3. EB. contortus Ell. Culms naked at the nodes: panicle rather narrow: awns 
spirally twisted: otherwise like the preceding.—Central Texas to Virginia. 
** No silky hairs in the panicle. 
4. EB. strictus Baldw. Culins rather slender, smooth throughout: panicle narrow 
and strict, 1.5 to2.5 din, long: spikelets 7 to 8 mm. long; outer glumes scabrous; awns 
Dp? 
straight, 1.5 cm. long.—Eastern Texas to Alabama and Tennessee, 
9. CHRYSOPOGON Trin. 
Panicle terminal, open: spikelets in twos or more, often threes, on 
the flexuous, articulate branches; the lateral ones pedicellate, sterile, 
and often reduced to mere hairy pedicels; the middle or terminal one 
sessile and perfect, spindle-shaped: glumes of perfect spikelet 4; the 
first and second nearly equal, coriaceous, 5 to 9-nerved, obtuse, convex, 
or the second somewhat carinate toward the involute apex; the third 
hyaline, 2-nerved; the fourth (floral glume) smaller, hyaline, 2-lobed, 
with a brown or golden awn from the sinus, rarely awnless; palet small 
or wanting: stamens 3: styles distinct, with short, plumose stigmas, 
1. C. nutans (L.) Benth. (INpraN Grass.) Roots perennial: culms simple, 1 to 
2m. high, smooth except the pubescent nodes: leaves narrowly lanceolate hispid ; 
sheaths smooth: panicle narrowly oblong, erect or nodding, rather loose, 1.5 to 3 dm. 
long: fertile spikelet 6 to 7mm. long, yellow or brown, shining above, pubescent, 
especially near the base; awn twisted and bent, 1 to 2 ci. long: sterile pedicels 
plumose, slightly shorter than the perfect spikelet. (4ndropogon nutans L.)—Com- 
mon in rather dry soil throughout the United States, but more abundant in the 
South. 
10. SORGHUM Pers. 
Panicle terminal, ample, dense or effuse: spikelets arranged like 
those of the preceding genus, but more persistent; sessile spikelet, 
broadly lanceolate or nearly spherical; outer glume hardened at matur- 
ity, very obscurely nerved and nearly glabrous. 
1. S. Halepense (L.) Pers. (JOHNSON GRass.) Perennial from strong running 
rootstocks: culms erect, branching, 1 to 1.5 m. high: leaves flat, smooth, except the 
hispid margins, 2 to 4 din. long: panicle pyramidal, rather open, 2 to 3 dm. long; 
rays mostly in threes or fours, naked at the base: spikelets about 5mm. long, slightly 
pubescent or glabrate, short-awned or awnless. (/Holeus halepensis L.)—Introduced 
originally from north Africa, Valuable for pasture or hay but very troublesome in 
cultivated lands. 
Nore.—S. vulgare is widely introduced in cultivation. This species includes the 
many varieties cultivated as sugar sorghum, Kattir corn, Jerusalem corn, and broom 
corn, 
11. ANDROPOGON L. 
Inflorescence in simple or paniculate spikes or spike-like racemes, 
either solitary, in pairs, digitate, or panicled: spikelets in pairs at 
ach node of the slender articulate rachis; one sessile, perfect, 1-tlowered, 
awned; the other pediceled, staminate, neutral or rudimentary, awn- 
less: glumes of the perfect spikelet 4; the first bifid or subobtuse, 
coriaceous or rigid, with two thickened keels; the second glume carin- 
