481 
This is one of the grasses, the ash of which lias been carefully ana¬ 
lyzed by Professor E. Emmons,* of Albany, in the State of New York. 
It contained— 
Silicic acid.*.... 17.950 
Phosphate of iron.. *.... 0.325 
Lime. 3.685 
Magnesia. 5.449 
Phosphoric acid. 6.894 
1 ’otask.. 36.656 
Soda. 1.885 
Sulphuric acid. 8.524 
Coal. 1.850 
Chloride of sodium... 5.723 
Carbonic acid, organic matter and loss. 11.053 
100.000 
Tire grass yields of water... 4.737 
dry matter. 95.263 
The hay contains nutritive matter. 87.951 
ash.i. 12.049 
GENUS 51. SET ARIA. Beauvais. 
9 
(Latin: seta, a bristle.) 
Spikelets two-flowered, with a cluster of several distinct bristles, re¬ 
sembling awns ; glumes two, unequal, membranaceous ; lower flower 
staminate or neuter ; paleae one or two, the outer one resembling the 
glume in texture ; upper flower perfect, coriaceous ; inflorescence a dense 
simple or compound, spike-like panicle. 
137. Setaria Verticillata. Beauvois. 
Syn. —Panicum verticillatum, Linn. 
Spike cylindrical, (green), somewhat interrupted, composed of appa¬ 
rently whorled short clusters ; bristles short, single or in pairs, rough- 
ened or barbed downwards. Annual; flowers in July. Culms about 2 
feet high. Native of Europe, Asia and North Africa ; naturalized. Ohio. 
About cultivated grounds. 
138. Setaria Glauca. Beauvois . 
g YN> _Panicum glaucum, Linn. Pennisetum glaucum, R. Brown. 
Bottle-grass. 
* Ag. of N. Y., vol. iL p. 81. 
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