160 TRIANDRIA— DIGYNIA, Bromus. 



The specific name alludes to the unprofitable nature of this grass 

 for the farmer. To whatever genus B. asper belongs, the present 

 species ought not to be separated from it, any more than the 

 following. 



10. B. diandrus. Upright Annual Biome-grass. 



Panicle upright, a little spreading, scarcely subdivided. 

 Florets lanceolate, with two close marginal ribs, and only 

 two stamens. 



B. diandrus. Curt. Lond.fasc. 6. t.f>. Fl. Br. 135. Engl. Bot. 



V. 14. *. 1006. Tr. of Linn. Soc. v. 4. 296. K7iapp t. 83. Graves 



Br. Gr. t. 102. Hook. Scot. 43. Sincl. 179. 

 B. madritensis. Linn. Sp. PL 1 14. MlUd. v. 1. 437. Schrad. Germ. 



i;. 1.366. Host Gram. v.\.\4. t.]7. 

 B. muralis. Huds. 50. Sibth. Oxon. 48. 

 B. ciliatus. Huds. ed. 1 . 40. 

 B. gynandrus. Roth Catal. v. 1. 15. 

 B. sterilis, erecta panicula, major. Barrel. Ic. t.76.f. 1. 

 Festuca madritensis. Desfont. Atlant. v.\.9\. 

 F. avenacea sterilis, paniculis confertis erectioribus, aristis brevio- 



ribus. Rail Syn.ed. 2.261. Pluk.Plujt. t.299.f.2. Herb.Sherard. 

 F. avenacea sterilis, pediculis brevioribus et spicis erectis. Moris. 



V. 3. 212. sect. 8. i. 7.f. 13. Herb. Bobart. 

 Gramen bromoides pumilum, locustis erectis majoribus aristatis. 



Scheuchz.Agr. 260. 



In sandy ground and on walls, but not general. 



Common in Jersey. Sherard. At the foot of St. Vincent's rocks, 

 Bristol. Sir Joseph Banks. Near Battersea church. Curtis. 

 About Edinburgh. Mr. Arnott. At Southampton. 



Annual. June. 



Root fibrous, small. Stems from 6 to 12 or 14 inches high, erect, 

 stiff, slender, round, smooth, leafy, with about 3 joints. Leaves 

 less downy than in B. sterilis, as are also the sheaths. Stipula 

 similar. Panicle totally different, being erect, tufted, and rather 

 close. Spikelets also erect, purple or brownish. Florets essen- 

 tially distinguished by having 2 strong ribs only, which are 

 close together, adjoining to the membranous margin at each 

 side. There are occasionally traces of an intermediate rib, in 

 the upper part only, between these and the keel. Hence Pro- 

 fessor Schrader describes 7 ribs, including, of course, the keel. 

 Inner tjafee strongly fringed. iVec^. of 2 narrow scales. Stamens, 

 whether in wild or luxuriant cultivated specimens, never more 

 than 2, as Roth also asserts, and as Dr. Withering observed in 

 Portugal. Styles short, lateral, much below the summit of the 

 germen, to which Roth found the stamens likewise attached, but 

 this circumstance is certainly not constant. Stigmas dense, fea- 

 thery. Seed lanceolate, channelled, attached to the inner glume. 



I 



