404 Bulletin No. 205 [March, 



ILLINOIS SPECIMENS : Without locality, Wolf, Sept., 1882. fulton co. Can- 

 ton, Wolf. PEOFMA CO. Peoria, Brendcl; Peoria, McDonald, July, 1904. wabash 

 CO. Without locality. Shearer, July, 1896; near Mt. Carmel, Shearer, July, 1896. 



Bromus purgans latiglumis {B. altissimus Pursh). — ^This variety 



has overlapping sheaths and an unusually large number of leaves. 



The sheaths are usually smooth except for a ring of hairs where they 



join the blades. 



JO DAVIESS CO. Warren, Pepoon 489. kane CO. Elgin, Sherff 1789. stark 

 CO. Wady Petra, V. II. Chase 1265. wabash co. Mt. Carmel, ^'c/t/itcfc in 1879; 

 Hanging Rock, Schneck, 



Bromus secalinus L. 

 Cheat, or Chess (Fig. 260) 



Lapham '57, 547, 582; Babcock '73, 97; Patterson '76, 51; Flagg '78, 282; 

 Higley and Raddin '91, 146; Huett '97, 130. 



Culms 1 to 3 feet tall ; sheaths typically smooth, strongly nerved ; 

 blades 2 to 8 inches long, 2 to 6 mm. wide, usually smooth, sometimes 

 slightly pubescent; panicle open, branches usually drooping; spike- 

 lets 5- to 15-flowered, smooth ; lemma 8 to 11 mm. long, thick, the mar- 

 oins inrolled at maturity, awns short and slender, generally 3 to 5 

 mm. long. 



This species was introduced from Europe and has now spread all 

 thru the temperate part of North America. It becomes a serious pest 

 in grain fields. As it is an annual, it should be prevented from ripen- 

 ing seed. All plants should be destroyed when first discovered in or- 

 der to prevent its spread into new localities. 



ILLINOIS specimens: Without locality, Vasey. champaign co. ' Urbana, 

 Clinton, June, 1888; Urbana, Seymour, July, 1878; Champaign, Seymour, July, 

 1878. christian co. Taylorville, Andreirs; Taylorville, De Mottc. cook co. 

 Woodlawn, Chicago, Millspaugh, June, 1898. DU page co. Wheaton, Moffatt, 

 June, 1892. jo daviess co. Without locality, Pepoon. macon CO. Decatur, 

 Clokey 2586. macoupin co. Carlinville, Robertson, June, 1882. marion CO. 

 Without locality, Laphum in 1857; without locality, M. S. Behb in 1860. PEORiA 

 CO. Peoria, Brendel in 1860; Peoria, McDonald, July, 1889. ST. clair co. 

 Mascoutah, Welsch; East St. Louis, Lchenbauer, May, 1914. stark co. Wady 

 Petra, V. H. Chase 1453. union co. Cobden, Earle, July, 1886. vermilion co. 

 Muncie, Masher, May, 1914. vs^abash co. Without locality, Schneclc, June, 1904. 

 Mt. Carmel, Schneclc, June, 1897 ; Timberville, Schneclc, June, 1879 ; Old Palmyra, 

 Schneclc, May, 1881. 



Brom.us tectorum L. 



Downy Brome Grass (Figs. 252 and 261) 

 Gates '12, .355. 



Culms in tufts, slender; sheaths and blades pubescent, the latter 

 1 to 4 inches long, 2 to 4 mm. wide ; panicle densely flowered, droop- 

 ing; spikelets on slender pedicels, 5- to 8-flowered, pubescent; lemmas 

 8 to 12 mm. long, awn 12 to 16 mm. long; glumes pubescent, the second 

 glume 3-nerved. 



This European species was first observed in Illinois in 1903, and 

 has spread very rapidly since that time. Four years ago, only a few 



