GRAMINEJE. (GRASS FAMILY.) 583 
Smaller (29— 49 high) ; leaves and sheaths smooth; panicle (6/—19' long) oblong ; 
awns short and twisted. — Var. BREVIBARBIS. (E. brevibarbis, Michx.) Smooth 
or nearly so; rachis of the oblong panicle rough (not woolly); hairs of the in- 
volucre shorter than the glumes. — Dry or wet soil, Florida to North Carolina. 
Sept. and Oct. 
2. E. strictus, Baldw. Culms, leaves, and sheaths smooth or slightly 
roughened; panicle (10'—15' long) spiked; involucre very short or none; 
glumes rough; awns straight. — River-banks, Florida and the lower districts of 
Georgia, and westward. Sept. — Culms 4°-8° high. Leaves 3 -6/ wide. 
Spikelets twice the size of the preceding. 
58. SORGHUM, Pers. 
Spikelets 2-8 together on the slender branches of the loose panicle; the lat- 
eral ones sterile or a mere pedicel; the middle or terminal one fertile. Glumes 
coriaceous or indurated, closely bearded, sometimes awnless. Otherwise like 
Andropogon. 
1. S. avenaceum. Panicle erect; glumes yellowish, lanceolate, the 
lower one hairy; one palea to each flower, linear, ciliate; awn rough, slender, 
twice as long as the glumes; sterile Sues reduced to one or two slender hairy 
pedicels. (Andropogon avenaceus, Micke. A. ciliatus, Ell.) — Dry sandy soil, : 
Florida to North Carolina. Sept. 1— Gant (29 — 49 high) and leaves smooth. ~ 
Panicle oblong, 6' — 12! long. 
2. S. nutans, Gray. Panicle long and narrow, nodding; glumes dark 
brown, the upper sparingly, the lower densely hairy ; paleæ of the upper flower 
2, unequal ; awn 4 times the length of the glumes, bent in the middle, rough 
above, twisted and hairy below ; sterile spikelets mostly rudiments. (A. nutans, 
L.) — Dry barren soil, Florida and northward. Sept. 1,— Culms 2? - 4? high. 
Panicle 1? — 2? long. 
3. S. secundum. Panicle erect, contracted, 1-sided; spikelets nodding ; 
glumes light brown, very hairy all over; otherwise like the last, and probably a 
variety of it. (Andropogon secundus, E//.) — Dry sand-ridges in the pine bar- . 
ns, Georgia and Florida. Sept. and Oct. — Culms 2° - 3° high. 
S. vurGARE, Pers, is the Durra Corn; S. saccnaratum, the Broom 
Corn; S. cernuum, Willd., the Guinea Corn. S. HALAPENSE, Pers., is 
sometimes cultivated under the name of Cusa Grass. 
"i 
59. LUZIOLA, Juss. 
Perennial aquatic or marsh grasses, with narrow elongated leaves, and pan- 
icled monæcious flowers; the pistillate and smaller staminate spikelets borne 
on separate panicles. — Spikelets scattered, on jointed pedicels, nearly terete, 
I-flowered. Glumes none. Pale» 2, nearly equal, membranaceous, concave, 
wes. eni Squamule 2. ‘Stamens 5 - 1: —À € 
