^ 



^MSETUM. TRIANDRIA. DIGYNIA. 127 



f 

 the inferio/, membranaceous, lacerate at the tip. Stamens 3. 

 Scigmas white, plumose. JVectarles lanceolate. 

 Hab. In wet meadows. June — July. 



This grass is, perhaps, not properly a Trisetum, but it cer- 

 tainly is nearer that genus than to Aira. hi tr,e awn it resem- 

 bles AvENA ; but the corolla having 2 distinct, though short, 

 bristles at me extremity, I have referred it to the genus Tri- 

 SETUM oi Pet soon. 



2. T. purpurascens*: panicle very simple, somewhat ra- 

 cemose, few-flowered ; calyx 3-flowered ; glumes very un- 

 equal, entire ; culm and leaves smooth ; stipule very short, 

 truncate. 



Rooi perennial. Culm about 2 feet high, leafy. Leaves narrow- 

 linear, 4 — 6 inches long, carinate. S.'ieaths smooth. Panicle 

 4 — 6 inches long, almost* a simple raceme of pedunculate 

 spikelets; lower branches elongated. S/iikelels lanceolate, 

 terete. Calyx of a reddish-purple colour, smooth ; glumes 

 lanceolate ; the inferior one indistinctly 3-nerved ; the other 

 5-nerved, sometimes lacerate at the tip when old. Inferior 

 valve' of the corolla scabrous, 7-nerved, attenuated and 2-cleft 

 at the extremity ; a%vH bent obliquely ; superior valve slightly 

 cleft, scabrous on the margin. 

 Hab. In mountain-meadows. Williamstown, Massachusetts. 

 Dewey. Near Boston. JBig-eioii?, On the Cattskill moun- 

 tains. jE « r 72. Near Montreal, Canada. Pain e. 



37. BROMUS, L, 



Spikelets oblong, distichous, many-flowered. Calyx 

 shorter than the florets. Inferior valve of the corolla 

 bifid, with a bristle between the teeth, a little below the 

 tip ; superior valve subconduplicate, ciliate. Gen, pi. 

 120. Nutt. Gen. I. p. 73. Juss. p. 32. Roem. 

 y> Schult. Gen. 325. P, de Beauv. t. XVII. 

 f. 9. Trin, Agrost. 103. Panicle compound, gene- 

 rally loose. Brome-grass. 



1. B. secalinus L. ; panicle spreading, a little branched ; 

 spikelets oblong-ovate, compressed; florets about 10, distinct, 

 rather remote, longer than the flcxuous bristles ; leaves some- 

 what hairy. iVilld. Spec. I. p. 428. Smith Fl. Brit. I. 

 p. 125. Eng. Bol.UWll, B i'g. Bost. p. 26. PurshFl. 

 I. p. 85. Elliott Sk. X.^.U'i. M u h l. Gram. ■p. \68. 

 Roem. ^ Schult. II. p. 633. 



Root annual. Culm 2 — 3 feet high, erect, terete ; nodes swelled 



and pubescent. Leaves broad-linear, dark green, hairy above. 



Sheaths smooth. Stipule oblong and retuse. Panicle ovate, 



about 4 inches long ; branches fasciculate, nearly simple, sea- 



