220 GRAMINEAE. 
2. Bromus eréctus Huds. Upright Brome-grass. (Fig. 507.) 
Bromus erectus Huds. Fl. Angl. 39. 1762. 
Culms 2°-3° tall, erect, simple, slender, smooth and 
glabrous. Sheaths shorter than the internodes, smooth 
and glabrous, or slightly pubescent; ligule 1’ long, 
erose-truncate; leaves sparingly pubescent, 1//-2// 
wide, those of the culm 4/-8’ long, the basal about 
1° long, very narrow; panicle 3/-7’ in length, the 
branches erect or ascending, the lower 1/—3/ long; 
spikelets %4’-1'4’ long, sometimes purplish, 5-10- 
flowered; empty scales acuminate, the first 1-nerved, 
the second longer, 3-nerved; flowering scales 5/’-6’’ 
long, acuminate, very rough-pubescent, 5-nerved, the 
intermediate nerves faint; awn 2//-3’” long. 
In waste places about New York. Adventive from 
Europe. July-Aug. 
3. Bromus asper Murr. Hairy Brome- 
grass. (Fig. 508.) 
Bromus asper Murr. Prodr. Stirp. Goett. 42. 1770. 
Culms 2°-6° tall, erect, simple, rough. Sheaths 
shorter than the internodes, strongly retrorse-hirsute, 
especially the lower; ligule 114’’ long; leaves 8/-1° 
long or more, 3’’-6’’ wide, rough or often hirsute; 
panicle 6’-12’ in length, open, the branches usually 
drooping; spikelets 5-10-flowered 1/-1 4’ long; empty 
scales acute, scabrous on the nerves, the first 1-nerved, 
the second longer, 3-nerved; flowering scales about 6’’ 
long, acute, hispid near the margins and on the lower 
part of the keel; awn 3/’—4’’ long. 
In waste places, New Brunswick to Michigan and Ken- 
tucky. Naturalized from Europe. July—Aug. 
4. Bromus tectorum L.1 Downy Brome-grass. (Fig. 509.) 
Bromus tectorum I,. Sp. Pl. 77. 1753- 
Culms 6/—2° tall, erect from an annual root, simple, 
smooth and glabrous. Sheaths usually longer than 
the internodes, at least the lower ones softly pubes- 
cent; ligule 1/’-2’’ long; leaves 1/-4’ long, 1//-2// 
wide, softly pubescent; panicle 2’-6’ in length, open, 
the branches slender and drooping, somewhat one- 
sided; spikelets numerous, 5-S-flowered, on capillary 
recurved slender pedicels; empty scales acuminate, 
usually rough or hirsute, the first I-nerved, the sec- 
ond longer, 3-nerved; flowering scales 4/’-6’’ long, 
acuminate, 7-nerved, usually rough or hirsute; awn 
6’7-8”’ long, 
In fields and waste places, Rhode Island to Ontario, 
south to Maryland and Ohio. Naturalized from Europe. 
Sometimes a troublesome weed. May-July. 
