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* 
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, ee 
TRIANDRIA. DIGYNIA. 57 
Srecies. 1. P. setaceum. 2. debile. 3 ciliatifolium. 4 
dasyphylium, Ev. 5 precox. 6 lave. 7. Floridanum. 8. pli- 
catulum. 9. purpurascens, E10. distichum. 11. vaginatum.— 
§ 11. Spikes in racemes.—12. membranaceum. 13. stolonife- 
rum. In New-Jersey, Pursh, Near New Orleans abundant. 
I suspect these 2 last marked as species, are varieties of 
the same plant. This species, originally discovered in 
Peru, has been greatly recommended to agriculturists. 
In warm, maritime situations, it continues growing 
flowering throughout the year, and is undoubtedly pro- 
ductive and important in South America; but in Euro 
it is entirely destroyed by the earliest frosts of the au- 
tumn, being quite a tropical annual a, 
This genus, with the exception of the above species, is 
confined to the West Indies and the tropical portions of 
the American continent; there is at the same time, 1 spe- 
cies in Japan, 2 in India, 1 in Surinam (Africa), and ano- 
ther in China. The P. conjugatum is common both to Ja- 
maica and Surinam. There are also a few species in 
x 
_ New Holland. Europe produces no species of this ge» 
a = 
85. ARISTIDA. ZL. eo Ss 
Culix 2-valved, t-flowered. Corclla 1-valved, 
terminated by 3 awns. , i 
Culm paniculate; panicle sometimes contracted likea 
dense spike, or elongated into a compound raceme, in ~~ 
others spreading or divaricate, in some species tricho- 
tomous, in others dichotomous. Flowers commonly 
nae 
4, gracilis, E. 5. oligantha. 6. dichotoma, (the larger con- 
9 *tuberculosa: Culm rigidly erect, dichotomous, wie 
the axillz of all the branches; panicle rigid, rathe 
ramuli eeniiesing ionecde te 
