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TRIANDRIA. DIGYNIA. 53s 
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have the valves of the calix approaching to equality, 
mostly acuminated; in these there is generally, if not 
constantly, an imperfect floret producing stamens, and 
they are usually furnished with a dichotomous pani- 
cle, either appressed, or diffuse and pyramidal.f : 
The generic character of Panicum is now described by ~ 
Schreberas follows: ; 
Calix of 2 very unequal valves, containing 2 flowers, 
the outer one male or neuter. Corolla of 2 unequal valves, 
finally cartilaginous and investing the seed. 3 
_ Schreber remarks, that the inner glume of the imper- 
fect flower being overlooked, its outer glume was con-- 
ceived to belong to the calix: hence the calix was thought 
to consist of 3 valves, of which the third was much the 
east. 
Species. § 1. Paniculate; flowers in dense racemes. 
“1. Crus-galli. 2. Walteri. 3. gibbum, Ex. 4. molie, (calix 
only 2-valved? but 2-flowered, one of the flowers stam-— 
niferous only, allied to Milium? Micu.) 5. gymnocarpon, 
Ex. (A very remarkable species, with the valves of the 
calix somewhat carinated, and nearly all equal, with an 
imperfect neutral rudiment attached to the buse of the — 
perfect flower; the whitish indurated corolla in seed al- 
‘most resembles a Se/eria, and is scarcely half the lengtl 
of the calix. This species is closely allied genu: 
Orthopogon of Brown, but the valves are only acuminated, — 
not awned ) 6. geniculatum, Ev. 7. anceps. 8. hians, Ev. 
(P. divaricatum. M1cw.) 9. fusco-rubens.—§ 11. Flowers it 
panicles.—10. virgatum. 11. nitidum. 12. dichotomum. 13. _ 
_ capillare. 1A, latifolium. 15. scoparium, 16. paucifiorum, Eu. 
17. amarum, (of an extremely bitter taste! Ex.) 18. scabrius- _ 
culum. 19. nervosum, E. 20. multiforum, E. 21. ovale, Be 
22. lanuginosum, E. 23. viscidum, B. (remarkably viscid — 
or glutinous near the nodes of the culm. Several other » 
species in the United States have glandular exudations.) 
24. villosum, Fin 25. pubescens. 26. spluerocarpon, E. 27. — 
ciliatum, EAZ8. ensifolium, E. 29. barbulatum. 30. microcar=_ 
pon, KF. 31. Melicarium. 32. debile, EK. 353. angustifoliume 
34. divergens, F.. 35. elongatum, Pursn. fae 
The southern and middle states of North Amer 
now afford about one third as many species of this | 
nus as are at present discovered in the world. About 1 
a genuine species of Panicum are described, independé 
s of those with involucellate spikes, which are now place: 
in the genus Pennisetum, and a few others in Orthe 
_ This habitus merely describes the Am 
