TRIANDMA, DK.YMA. 53 



P. culm erect; leaves short, very glabrous;** 



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. (Graminex.) 



CalKv 2-valvcd, 1-flowered. Corolla 1-valvcd, 

 terminated by 3 awns. 



1. A. culm setaceous, erect, somewhat dichotomous; dichotomy 

 calix longer than the corolla ; the lateral awns very 

 short, the intermediate longer, contorted. Elliot. 



Branching, or forked Aristhla. 



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. Xuttall says 

 the larger contorted awn of this species, is hygrometric- 

 Perennial. September. 



50. Stipa, L. ( Graminex. J 



Calix 2-valvcd, 1-flowered. Corolla shorter 

 than the calix, 2 valvcd ; valves involute and 

 truncate. Awn terminal, very long-, deci- 

 duous, and contorted at the base. .Xutt. 



1. S- leaves convolute-filiform, panicle few-flowered : ,,ic1 ' 

 branches simple, 1, 2 flowered, calices oblong 

 acuminate scarcclv longer than the seed, corolla 

 stipitated : stipe bearded. Va'd. 



S. barbatn. Mich. fl. Am. 1. p. 53, but not of Dcs- 

 fontaines. 



S. Virginica, Pers. ench. I. p. 99. 



S. Avenacea, Walt, not of Linn tus. 



I 



