134 BROMUS. [ CLAS S III. ORDER II. 



erect, mostly tinged with purple or brown, about an inch long, and 

 eight-flowered, roughish. Florets inserted upon the flower -stalk by a 

 swollen base. Glumes very unequal, roughish : the outer keeled, awl- 

 shaped ; the inner with a keel and two lateral ribs. Glumelles une- 

 qual: the outer valve long, narrow, the margin membranous towards 

 the extremity, the apex bifid, having four lateral ribs and occasional 

 intermediate ones, the keel terminating in a long rough awn. Stamens 

 two, hence its specific name. Stigmas leathery. Fruit very long, 

 narrow, channelled on one side, the apex hairy. 



Habitat. Rare, on dry saudy ground and on walls, principally in 

 the South of England. About Edinburgh, Scotland Mr. Arnott. 



Annual ; flowering in June and July. 



5. B. erec'tus, Hudson, (Fig. 172.) upright Brome-grass. Panicle 

 erect, slightly branched ; spikelets compressed, smooth ; awn 

 about the length of the rather remote florets ; root leaves very 

 narrow and ciliated. 



English Botany, t. 471. English Flora, vol. i. p. 157. Lindley, 

 Synopsis, p. 312. Hooker, British Flora, vol. i. p. 52. Sinclair, Hort. 

 Gram. Woburn. p. 203. 



Root strong, fibrous. Stem erect, smooth, leafy, slender, from two 

 to three feet high. Leaves numerous : the upper ones broad, linear, 

 nearly smooth ; the lower ones narrower, clothed with hairs. Sheaths 

 close, striated, downy, and more or less hairy. Ligula short, mostly 

 torn. Inflorescence an erect, rather close, more or less branched pani- 

 cle. Spikelets erect, about an inch long, nearly smooth. Florets 

 mostly seven, purplish, spreading when in flower. Glumes very une- 

 qual : the outer awl-shaped and keeled ; the inner lanceolate, acute, 

 keeled and ribbed. Glumelles equal, acute : the outer one lanceolate, 

 its margins membranous, the apex bifid, smooth or scabrous at the 

 back, with two strong ribs and one or two slight intermediate ones, the 

 keel tapering into a straight awn. Stigmas feathery. Anthers yellow- 

 ish saffron colour. 



This plant has much the habit of Brachypo'dium sylvat'icum. 



Habitat. In fields and by road-sides, especially in a sandy soil over 

 chalk, not common. About Edinburgh, frequent. On a calcareous 

 soil, Lands of Santry and Coolock, Ireland Mr. J. White. 



Perennial ; flowering in July. 



6. B. arven'sis, Linn. (Fig. 173.) taper Field Brome-grass. Panicle 

 spreading, at length drooping, its branches subdivided ; spikelets 

 compressed, smooth ; awn about the length of the imbricated flo- 

 rets ; leaves hairy. 



English Botany, t. 1984. English Flora, vol. i. p. 156. Lindley, 

 Synopsis, p. 312. Hooker, British Flora, vol. i. p. 52. Sinclair, Hort. 

 Gram. Woburn. p. 173. 



