47 



pubescent or somewhat eiliate, tlie radicnl condnpUcate, those of the stem some- 

 what broader, about 1-2 dm. long. Panicle about 1-2 dm. long, narrow, 

 pyramidal, l)ranches erect or ascending. Spikelets fusiform-cylindric before 

 flowering, afterwards oblong-lanceolate and somewhat laterally compressed, 

 5-10-flowered, sometimes purplish; empty glumes acuminate, usually scabrous 

 on the nerves; the lower 1-nerved, 6-8 mm. long; the upper 3-nerved, 8-10 

 nun. long; flowering glume 10-12 mm. long, 5-nerved, oblong-lanceolate, 

 acuminate, shortly l)i(lentate with narrow scarious margins and apex ecenly 

 iicahriiux-puhi'xcent on the back; 

 awn straight, slender, 5-6 

 mm. long. An ad ventive spe- 

 cies from Europe. 



Specimens e.xamined — Onta r 1 n : 

 Kingston (J. Fowler in 1895). 

 Vennont : (C. G. Pringle in 

 1877). 



This species is reported in Britton 

 & Brown. 111. Fl., as being 

 introduced in waste })laces 

 about New York. The speci- 

 men collected by J. Macoun, 

 No. 76, ^'ancouver Island, 

 and named B. iihicouiiH by 

 Yasey, seems to us a mere 

 form of this species, differing 

 ( ml y in its somewhat narrower 

 and more rigid panicle. This 

 species is nearly related to B. 

 pvmpelUanus. 



27. BROMUS INERMISLeyss. 



Fl. Hal. 16. 1761. Srhedu- 

 norus inerm is Beauv. Agrost. 



99. 1812. (Fig. 28.) 



An erect, smooth perennial with 

 a creeping rootstock and erect, 

 broadly pyramidal or Kubcorym- 

 bose panicle. Culm rather 

 stout, smooth, about 5-9 dm. 

 high. Sheaths smooth; ligule 

 1.5-2 nun. long, subtruncate, 

 somewhat lacerate ; blades 

 linear-lanceolate, flat, smooth, 

 or minutely scabrous, about 



1.5-2.5 dm. long and about 5-10 mm. broad. Panicle rather dense, somewhat 

 <liffuse, 10-20 cm. long. Si^ikelets erect or somewhat drooping, narrow, terete, 

 about 2-2.5 cm. lony and 4-5 mm. vide after flowering; empty glumes smooth, the 

 lower narrow, acute, 1-nerved, 4-5 mm. long, the upper subacuminate, 3-nerved, 

 about 6-8 mm. long; flowering glume obtuse, emarginate, 5-nerved, about 9-12 

 7nuK lony, typically glabrous, but sometimes ciliate-pubescent on the lower half of 

 the margins and the midrib, muticous or with an awn sometimes reaching 3 

 mm. long; palea equaling the glume. 



Fig. ■27.—Bromus ercctus : a, empty glumes ; b, lateral view 

 of the flowering glume with a Joint of the rachilla. 



