9 
2. BE. brevibarbis Michx. (Gray’s Manual, 6th ed., p. 637.) Culms 3 to5 feet high; 
maiu rachis of panicle pubescent or nearly smooth; panicle more open and the silky 
hairs usually shorter than the spikelets.—Maryland south to Florida and west to 
Texas. 
E. contortus Ell. seems to differ from the preceding only in atwisted awn, and 
the difference is hardly sufficient to entitle it to be called a variety.—Same range as 
preceding. 
3. HE. strictus Baldw. (Chapm. FI. 8. States, p. 583.) Culms 4 to 8 feet high, 
smooth; leaves 1 to 2 feet long, smooth, or scabrous beneath; panicle narrow and 
strict, 10 to 15 inches long, no silky hairs; spikelets 4 lines long; the outer glumes 
scabrous; awns straight, 8 lines long.—Georgia, Florida, Tennessee to Texas, 
CHRYSOPOGON Trin. 
Panicle open, the branches usually short; spikelets in pairs, some- 
times in threes, the outer sessile one fertile, the pediceled ones sterile 
or reduced to a rudiment; fertile spikelet with 4 glumes, the lower one 
larger and coriaceous, second narrow, keeled, pointed, the third hyaline, 
empty, the fourth or flowering glume hyaline, and awned, rarely awnless; 
palet very small or wanting. 
The genus Sorghum Pers. differs from Chrysopogon principally in the glumes of the 
fertile spikelets becoming more hardened after flowering. Prof. Hackel includes the 
genus under Andropogon. 
1. C. nutans Benth. (INDIAN GRASS, Woop GRass.) (Gray’s Manual, 6th ed., p. 
638.) Root perennial; culms simple, 3 to 6 feet high, smooth; leaves linear-lanceolate, 
sheaths smooth; panicle narrowly oblong, crowded or loose, erect or nodding, 6 to 12 
. inches long; fertile spikelets about 3 lines long, lanceolate, yellowish or brownish, 
sparsely hairy; awn twisted, 6 to 10 lines long ; pedicel of the sterile or imperfect 
spikelet plumose hairy.—Very widely spread, Atlantic to Rocky Mountains and 
Mexico. 
I find no permanent characters to distinguish this from Andropogon avenaceus 
Michx. 
2. C. secundum Benth. (Andropogon unilaterale Hack. ; Sorghum secundum Chapm. 
in Fl. S. States.) Culms 2 to 3 feet high; panicle narrow, erect, one-sided, 6 to 12 
inches long; glume light brown, very hairy all over, otherwise like C. nutans.—Very 
dry ridges in the pine barrens Georgia and Florida. 
3. C. Wrightii Munro. (Sorghum pauciflorum Chapm. in Fl. 8. States, Suppl. 
p. 668; (Andropogon pauciflorus Hack.) Annual; culms branched near the base, 2 to 3 
feet high; leaves long, broadly linear, flat, ciliate; spikelets few (6 to 12), racemose ; 
pedicels 2 to 3 inches long, setaceous in whorls of 2 to 6; perfect spikelets 4 lines 
long, the pediceled ones as long but slender and reduced to 2 glumes; first and sec- 
ond glumes of fertile spikelets equal, linear, 5 to 6 inches long, geniculate, twisted 
below the middle.—Sandy pine barrens East Florida (Chapman). 
ANDROPOGON Linn. 
Inflorescence in simple or paniculate spikes or spike-like racemes, 
either solitary, in pairs, digitate, or panicled. Spikelets in pairs in 
the alternate notches of the rachis, one sessile and fertile, the other 
pediceled and sterile, (this either male or empty, or reduced to a mere 
pedicel); fertile spikelet with two, more or less coriaceous outer glumes, 
a third hyaline empty glume, and the fourth or flowering glume also 
hyaline and awned; the sterile spikelet similar, but empty or male only, 
and unawned. Palet small and hyaline or wanting. 
Our species of this genus belong to several sub-genera or sections, 
