GRASS FAMILY. 
11. Bromus squarrosus L,. Corn 
Brome. (Fig. 516.) 
Bromus squarrosus Y,. Sp. Pl. 76. 1753. 
Culms 8/-18/ tall, erect, simple, smooth and 
glabrous. Sheaths shorter than the internodes, 
softly pubescent; ligule 14’ long; leaves 1/-5’ 
long, 1’’-2’’ wide, softly pubescent; panicle 2’—6’ 
in length, open, the branches ascending or 
drooping, often flexuous; spikelets nodding, 6- 
12-flowered, on slender pedicels; empty scales 
obtuse or acutish, the first 5-nerved, the second 
longer, 7—9-nerved; flowering scales 414//-5 4// 
long, obtuse, shining, minutely scabrous; awn 
inserted below the apex, about as long as the 
scale, bent at the base and divergent. 
In ballast and waste places about the eastern sea- 
223 
ports. Fugitive or adventive from Europe. July- 
Aug. 
12. Bromus brizaeformis Fisch. & Mey. Quakegrass Brome. (Fig. 517.) 
Bromus brizaeformis Fisch. & Mey. Ind. Sem. Hort. 
Petrop. 3: 30. 1836. 
Culms 8/—2° tall, erect, simple, often slender, 
smooth and glabrous. Sheaths shorter than the 
internodes, the lower pubescent with soft villous 
hairs; ligule 1’” long, erose-truncate; leaves 1/—7 
long, 1’’-3’ wide, pubescent; panicle 11%4/-8’ in 
length, open, the branches ascending or often 
drooping, flexuous; spikelets few, 14/-1’ long, 
laterally much compressed; empty scales very ob- 
tuse, often purplish, glabrous or minutely pubes- 
cent, the first 3-5-nerved, the second larger, 5-9- 
nerved; flowering scales 3/’—4/’ long, very broad, 
obtuse, 9-nerved, shining, glabrous or sometimes 
minutely pubescent, unawned. 
Sparingly introduced into Pennsylvania; also from 
Montana to California. 
Asia. July—Aug. 
Native of northern Europe and 
13. Bromus breviaristatus (Hook. ) Buckl. Short-awned Chess. (Fig.518.) 
Cerdtochloa breviaristata Hook. Fl. Bor. Am. 2: 253. 
1840. 
Bromus breviarista/us Buckl. Proc. Acad. Phila. 1862: 08. 
1862. 
Culms 1°-4° tall, erect, simple, smooth or rough, 
sometimes pubescent below the panicle. Sheaths pu- 
bescent, at least the lower ones, which are often over- 
lapping; ligule 1/’ long, truncate; leaves 6/-1° long or 
more, 2’’-6’’ wide, rough and often pubescent; pan- 
icle 4’-15’ in length, its branches erect or ascending, 
the lower 2’-6’ long; spikelets 5-10-flowered; empty 
scales acute, pubescent, the first 3—-5-nerved, the sec- 
ond longer, 5-9-nerved; flowering scales compressed, 
keeled, 6’’-7’’ long, acute, 7-9-nerved, appressed- 
pubescent; awn 2/’-3/’ long. 
In dry soil, Manitoba to British Columbia, south to 
Nebraska, Arizona and California. July-Aug. 
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