TRIANDRIA, DIGYNIA. 
5 
2. P. culm erect ; leaves short, very glabrous ; laeve, 
spikes alternate ; flowers 2-rowed, glabrous, 
large. 
P. lentiferum, Lam. Ency. 5. p. 30, 
P. membranaceum, Walt. 
P. lentifer, Flugge. 
Occurs about as frequently as the preceding. August. 
Aristida, Gen pi. 125, ^ Graminece* J 
Calix 2-valved, 1-flowered. Corolla 1-valved, 
terminated by 3 awns. 
1. A, culm setaceous, erect, somewhat dichotomous; dichotoma, 
calix longer than the corolla ; the lateral awns very 
short, the intermediate longer, contorted. Elliot, 
Branching,^ or forked Aristida* 
A very ordinary looking grass, about a foot high, common 
on gravelly road-sides and stony commons. Frequent, On 
the Canal road to Lemon-hill, abundant. Mr. Nuttall says 
the larger contorted awn of this species, is hygrometric. 
Perennial. September. 
50. Stipa, L, ( Graminece, 
Calix 2-valved, 1-flowered. Corolla shorter 
than the calix, 2 valved ; valves involute and 
truncate. Awn terminal, very long, deci- 
duous, and contorted at the base. Nutt. 
1. S. leaves convolute-filiform, panicle few-flov/ered : 
branches simple, 1, 2-flowered, caiices oblong 
acuminate scarcely longer than the seed, corolla 
stipitated ; stipe bearded. FahL 
S. barbata. Mich. fl. Am. 1. p. 53. but not of Des- 
fontaines. 
S. Virginica, Pers. ench. 1. p. 99. 
S* Avenacea, Walt, not of Linnaeus. 
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