770 GRAMINE Au BROMUS 
ascending, 1-3 inches long: spikelets appressed-pubescent : empty glumes 
acute, the first 3-nerved, the second longer, 5-7-nerved: flowering glumes 
broad, obtuse, 344-414 lines long. In fieldsand waste places. 
VAR. GLABRESCENS Shear U. S. Dept. Agr. Div. Agrost. Bull. 23, 20. 
Spikelets glabrous or only scabrous throughout. In fields and waste places. 
B. srizerormis F. & M. Ind. Sem. Hort. Petrop. iii, 30. Stems 8-24 
inches high, erect, glabrous; sheaths shorter than the internodes: the 
lower pubescent with soft villous hairs: ligules 1 Jine long, erose-truncate: 
leaves pubescent: panicle I-8 inches long, open, the branches ascending 
or often drooping: spikelets few, 4-1 inch long, compressed : empty glumes 
very obtuse, the first 3-5-nerved, the second larger, 5-9-nerved: flowering. 
glumes, 3-4 lines long, very broad, obtuse, 6-nerved, not awned. In fields 
and waste places. 
§ 2 sTENoBROoMUS Griseb. Annuals or biennials with mostly 
narrow-glumes and rather long awns. 
B. Maonprirensis L. Cent. Pl. i, 5. A tufted annual: stems erect, or 
somewhat geniculate at base, smooth, 1-2 feet high,: sheaths smooth, or 
the lower slightly pubescent: ligules about 1 line long, subtruncate and 
acerate: leaves 2-7 inches long, 1-2 lines wide: panicle erect, 2-6 inches 
long, oblong-ovoid, the lower branches somewhat spreading, 6-12 lines 
long: spikelets 144-2 inches long, nearly smooth to scabrous, 7-11-flowered: 
empty glumes lanceolate, acuminate, the first 1-nerved, 5-7 lines long, the 
second 3-nerved, 7-8 lines long: flowering glumes linear-lanceolate 7-9 lines 
long, distinctly 3- or faintly 5-7-nerved, with 2 acute, hyaline teeth, bear- 
ing a long rough somewhat curved awn. Southern Oregon to California, 
naturalized from Europe. 
B. Gussonr Parl. Rar. Pl. Sic. 2, 8. An erect annual, 6-30 inches 
high: sheaths pilose-pubescent: ligules 1-2 lines long, rounded above: 
leaves pilose both sides: panicle lax, 4-8 inches long, the upper part some- 
what drooping: spikelets usually 3-7-flowered, 4-6 lines long : empty glumes 
smooth, lanceolate acuminate, the first 8-10 lines long, strongly 1-nerved, 
the second broader and longer, prominently 3-nerved: flowering glumes 
5-nerved, 10-12 lines long: awn stout, 2-246 inches long, very rough. In 
waste places, Washington to California and Arizona. . 
B. rupens L, Cent. Pl. i, 5. A tufted annual: stems about 10 inches 
high, erect, pubescent toward the top: sheaths pubescent: ligules }¢-1 
line long, laciniate-dentate: leaves 2-7 inches long, pubescent both sides: 
panicle erect, compact, ovoid, usually purplish, 2-4 inches long: spikelets 
mostly 7-11-flowered, 1-114 inch long: empty glumes acuminate, smooth 
to scabrous, the fitst narrow, l-nerved, 3-5 lines long; the second broader 
and longer, 3-nerved; flowering glumes 7-8 lines long, lanceolate, acute, 
5-nerved, scabrous, deeply cleft at the apex into 2 long-acuminate hyaline 
teeth: awns straight, 8-12 lines long. In waste places: introduced from 
Europe. 
B. steriuis L. Sp. 77. Stems 144-3 feet high, erect, smooth, from an 
annual or biennial root: sheaths usually shorter than the internodes, the 
lower sometimes pubescent: ligules 1 line long: leaves 3-9 inches long, 1-3 
lines wide, usually more or less pubescent: panicle 5-10 inches long. its 
branches ascending, or often widely spreading, not one-sided, stiff: spike- 
lets few, 5-10-flowered; spreading or pendulous: empty glumes acuminate, , 
glabrous, the first 1-nerved, the second longer, 3-nerved; flowering glumes 
6-8 lines long,:acuminate, 7-nerved, scabrous on the nerves: awns 7-12 
lines long. In waste places; introduced from Europe. 
B. tecrorum L. Sp. 77. Stems 6-24 inches high, erect, from an annu- 
al root, simple, smooth: sheaths usually exceeding the internodes, at least 
