22 



uous. Spikelets oblong to oblong ovoid, turgid, 6-12-flowered, 15-20 mm. long; 

 empty glumes broad, obtuse, glabrous, the lower 3- or indistinctly 5-nerved, 

 |-| the length of the upper, the upper 7-9-nerved, 6-8 mm. long; flowering glume 

 very broad, 7-9-nen-ed, ohime, with a Inroad scarious margin somewhat obtusely 

 angled al:)ove the middle, glabrous or minutely scabrous, apex minutely notched; 

 awn ratlnr Htont, attached below the apex, about the length of the glume, somewhat 

 twisted and divergent, espccialbj at niatarity; palea a little shorter than its glume. 

 Adventive from Europe. Has been found in waste places on the eastern coast sec. 



Britton and Brown, " Illustrated Flora." 

 Type in Linnseus's herbarium. 



Specimens examined: A single specimen in the National Herbarium collected at 

 Lansingburg, New York, by Dr. E. C. Howe in 1886, has been referred to this spe- 

 cies, though it is not 

 typical but approaches 

 very closely B. secalinus 

 and arvensix. 

 7. BROMUS BRIZ^- 

 FORMIS Fisch. &Mey. 

 Ind. Sem. Hort. Petrop. 

 3:30. 1837. (Fig. 7.) 



An erect annual with rather 

 slender culms and large 

 drooping, hriz sef o r m 

 spikelets. Culms about 

 3-6 dm. high, smooth or 

 sUghtly pubescent at the 

 nodes. Sheaths with a 

 soft, short-pilose pubes- 

 cence, especially the 

 lower ones; ligule about 

 2 mm. long, somewhat 

 laciniate; Ijlades linear, 

 usually pubescent on 

 both sides. Panicle 5-25 

 cm. long, lax, secund, 

 mostly nodding. Spike- 

 lets a b o u t 15-25 mm. 

 broad, oblong-ovoid, lat- 

 erally much cotnpressed; 

 empty glumes broad, ob- 

 tuse, smooth or minutely 

 scabrous, frequently 

 purplish, lower 3-5- 

 nerved, about one-half 

 the length of the upper, 

 which is broader, 5-9- 

 nerved and 6-8 mm. 

 long; flowering glume 

 about 1 cm. long, very broad, obtuse, smooth or slightly scabrous, with a broad 

 scarious margin; awn none or sometimes present, especially on the upper flower- 

 ing glumes, terminal, 1-2 mm. long; palea not quite equaling the glume, sparsely 

 pectinate-ciliate on the keels. 

 Introduced. Most frequently met with on the west coast. 

 Type locality "in moutibus Taliisch." (Caucausus Region?) 



Fig. 6. — Bromtis squarrosus : a, lower portion of a spikelet; t, dorsal 

 view of a flowering glume. 



