578 GRAMINEE. (GRASS FAMILY.) 
* Bristles roughened downward. 
L B. verticillata, Beauv.  Culms sparingly branched; leaves linear- 
lanceolate, rough above; spike cylindrical, compact, somewhat interrupted be- 
low (2'-3' long) ; bristles short, single or by pairs. — Around dwellings, North 
Carolina, and northward. Introduced. — Culm 29 high. 
* * Bristles roughened upward. 
2. S. glauca, Beauv. Culms smooth, slightly Eco ey leaves linear- 
lanceolate, rough above; spike nearly simple, cylindrical; bristles 6-10, in 2 
clusters, longer than the spikelets; perfect flower transversely wrinkled.— Var. 
LZEVIGATUM (Panicum levigatum, Ell.) has a more flattened culm, longer, nar- 
rower and smooth leaves, and the perfect flower obscurely wrinkled. — Culti- 
vated ground, the var. in damp soil along the coast, Florida to North Carolina. 
— Culms 1°~3° high. Spikes 2' -3/ long, pale or purplish. 
3. S. viridis, Beauv. Culms smooth, terete; leaves lanceolate or linear- 
lanceolate, rough; spikes compound, cylindrical, dense ; bristles 1-3 to each 
spikelet ; perfect flower finely striate and dotted lengthwise. — Around dwell- 
ings. Introduced. June- Sept. — Culms 19 - 2° high. Spikes 1/-2/ long. 
4. S. corrugata, Schult. Culms, narrow (2" wide) leaves, and sheaths 
rough; spikes compound, cylindrical, dense, erect or bending; spikelets 6-10 
in a cluster; bristles one to each spikelet, elongated; perfect flower obtuse, 
strongly wrinkled. (Panicum corrugatum, Ell.) — Dry soil, Florida and Georgia. 
July and Aug. — Culms 2°-3° high. Spikes 3/-6/ long, purple. 
5. S. composita, Kunth. Culms smooth; leaves linear-lanceolate, the 
fringed sheaths rough-hairy at the throat; spikes loose, compound, the lower 
clusters scattered ; bristles single or by pairs, many times longer than the spike- 
lets; perfect tower acute, with faint transverse lines. — Dry sandy soil along 
the west coast of Florida, Apalachicola to Key West. June- Aug.— Calms 
a ae long. Leaves 1° or more long. Spikes 6/~ 12’ long. 
6. S. Italica, Kunth. Culms tall (49 — 89 high), smooth, branched; leaves 
(}/-1' wide) very rough ; spikes compound (6/-18/ long), cylindrical, dense, 
the lower clusters scattered; bristles 1-2 to each spikelet, elongated ; fertile 
flower smooth and even. — Swamps along the coast, Florida to North Carolina. 
July -Sept. — This, and Penicillaria spicata, Willd., are commonly cultivated, 
under the name of MıLLET, as green food for cattle. "The latter seems to be 
the Panicum cenchroides, Ell. 
51. CEN CHRUS, L. COCK-SPUR. 
p aa or creeping grasses, with the spikeleta of Panicum proper, bat $ em 
closed, 1 -several together, in spiny or bristly, at length indurated and decid- 
‘uous involueres ; the latter matte, and eget in a terminal spike. Stamens 
3. E united below. —— T 
C. echinatus, L. Spikes plinth; Pape of 20 or moro globale F 
iei, Spence cocer dod 
