TRIANDRIA— DIGYNIA. Bromus. 151 



long, compressed, imbricated spikclct, of many alternate, 

 two-ranked, awned, perfect forcfs. Cor. of 2 unequal 

 valves; the outer elliptical, rarely lanceolate, concave, 

 scarcely compressed, more or less ribbed, longer than the 

 calyx, flat, or a little inflexed, at the edges ; cloven at the 

 summit; awned at the back just below die summit; cam 

 tapering, wavy, direct, generally as long as the glume, 

 or longer, decurrent at the base ; inner glume nearly as 

 long as the outer, but much narrower, two-ribbed, cloven 

 or entire at the summit, its margins membranous, folded 

 in at each rib, which is strongly fringed v.ith rather di- 

 stant bristles, curved ujnvard. Ned. a deeply divided 

 scale, or of 2 distinct entire ones. Filam. caj^illary, shorter 

 than the cor., sometimes but 2. Anth. generally short, pen- 

 dulous, notched at each end. Germ, ovate. Styles distant, 

 lateral. Stigmas densely feathery. Seed elliptic-oblong, 

 depressed, downy at the summit, concave or channelled 

 on the upper side, which is united to the unchanged in- 

 ner valve of the corolla, the other valve being usually 

 loose. 



Root mostly annual or biennial : perhaps always one or the 

 other in the genuine species. Stems one o/more, erect, 

 simple, leaty. Herbage more or less downy, or hairy. 

 Panicle somewhat branched, many-flowered. 



1. B. sccalinus. Smooth Rye Brome-grass. 



Panicle spreading; slightly subdivided below. I^pikelets 

 ovate, of about ten, distinct, somewhat cylindrical, smooth 

 florets. Awns wavy, shorter than the glumes. Leaves 

 slightly hairy. 



B. secalinus. Linn. Sp. PL 112. mild. v. 1 . 428. Fl. Br. 125. 

 Engl. Bot. v.\7.t.\\7\. Tr.of Linn. Soc. t;. 4. 28 1 . Kyjapp 

 t. 79. Hook. Scot. 41 . Schrad. Germ. v. 1 . 347. Host Gram. 

 t\ 1. 10. ^ 12. Ehrh. Calam. 45. Leers 36. t. \l.f.2, not ex- 

 cellent. 



B. polymorphus y. Huds. 49. 



B. vitiosus, PVeig. Obs. 4. t. \.f. 2. 



Festuca avenacea, spicis habitioribus, glumis glabris. Raii Sijn.4\4. 



F. graminea, glumis glabris. Scheuchz. Agr. 2b\.t. 5./. 10. 



Gramen avenaceum, locustis majoribus squamatis, segetale majus 

 Moris. V. 3. 2\2. sect. 8. t.7.f. 16. 



In cornfields. 



Annual. July — Seplonber. 



