m TUlAKDRfA. DIGYNIA. bromus. 



the back ; bristle half the length of the floret ; superior valve 

 shoiter, slightly ciliate on the margin, entire at the tip ? 

 Hab. On rocky hills, in woods, See. Jane. 



2. B. canadensis Mich.? Culm erect, 3 — 4 feet high. 

 Leaves glaucous, long, about 3 lines broad, hairy on the 

 upper surface. Panicle at length nodding, loose, capillary ; 

 branches in pairs ; the lowest ones with a sheathing Ijract at 

 the base. Sfiikelets oblong, closely imbricate even when old, 

 10— 12-flowered* Calyx hairy; glumes acute, (not mu- 

 cronate.) Inferior valve of the corolla lanceolate, very hairy 

 on every part, 7-nerved ; bristle not half the length of the 

 floret ; superior valve hairy, distinctly ciliate on the margin. 



Hab. In moist meadows, and in woods; rarer than the 

 preceding. June — July. 



The latter species agrees with Muhlenb er g^s de 

 scription of B. cUiatus. 



3a. ARRHENATHERUM. Beau v. 



Calyx membranaceous, 2-flowerecl, rather shorter 

 than the florets. Inferior floret antheriferous ; inferior 

 valve 2-cleft, avvned below the middle. Superior floret 

 perfect ; inferior valve cleft^ unarmed, or with a short 

 awn a little below the tip. Roem.^Schult. Gen, 

 275. P. de Beaiiv. t. XL f. 5. Trin. Agrost. 115. 

 AvEN^ spp. L, HoLci spp. Smithy &c. Panicle 

 compound. 



1, A. avf.nareum P. de B.: panicle equal, nodding; 

 awn as long again as the flower; culm geniculate, smooth; 

 root nodose. Roem, ^ Schutt. II. p. 496. Avena e/a- 

 tior L. Willd. Spec. I. p. 443. Muhl. Gram. p. 185. 

 Hoi.cus avenaceus Smith FL Brit. I. p. 90. Eng. Bot. 

 t. 813. Hook. FLScot. I. p. 28. 



Root perennial, creeping. Culm about 3 feet high. Panicle 

 loose ; branches in pairs, or ternate. Sfiikelets brownish ; 

 fiorets hairy at the base. Glumes unequal, acuminate, shorter 

 than the florets, without nerves, pubescent on the keel. In- 

 ferior valve of tlie lower floret with a very contorted aivn near 

 the base. Sufierior Jloret sometimes with a short awn. Sta- 

 mens 2,; anthers yellow. Stigmas w\\i\.Q. 



Hab. In fields and cultivated grounds; rare. June. Introduced 

 from Europe. 



2. A. pemisylvanicum*: panicle attenuated ; awns twice 

 as lot.g as the ilorets; seeds villous. Avena peyvisyfvanica 

 L. Sp. pL 117. Willd, Spec. I. p. 445. Muhl. Gram. 

 p, 185. Pursh FlA.]},8d, E Uio 1 1 Sk. U^. ni» Tr! 



