772 GRAMINEZ BROMUS 
ennial: stems smooth: or pubescent just below the nodes, 2-3 feet high: 
sheaths smooth: ligules about 4 line long, truncate, dentate : leaves usually 
5 or 6, 4-8 inches long, 5-6 lines wide, rather abruptly acuminate, firm and 
smooth ; panicle narrow, erect, rather dense, 3-8 inches long, its branches 
erect, or ascending, the longest 1-2 inches long: ‘spikelets 5-9-flowered, 1- 
1% inches long, terete at first: empty glumes glabrous, or scabrous on the 
nerves the first acuminate-lanceolate, l-nerved, or sometimes with a pair 
- of short lateral nerves, 5-6 lines long; the second broader, subacute, 3- 
nerved, 6-7 lines long: flowering glumes oblong-lanceolate subacute, 7-8 
lines long, 5 or 7-nerved, appressed-pubescent near the base, emarginate 
at the apex: awn 1-2 lines long: palets about 34 as long as the glumes, 
In open places on the high mountains, Washington to California. 
_B. rnermis Leyss. Fl. Hal. 16. An erect smooth perennial: stemg 
rather stout, smooth, 2-3 feet high : sheaths smooth: ligules 44-1 line long, 
subtruncate, somewhat lacerate: leaves smooth or minately scabrous, 6-10 
inches long, 2-6 lines wide: panicle, 5-10 inches long: spikelets narrow, © 
terete, 1-114 inches long; empty glumes smooth, the first narrow, acute, 
1-nerved 2-244 lines long; the second subacuminate, 3-nerved, 3-4 lines 
long: flowering glumes obtuse, emarginate, 5-nerved, 6-7 lines long: glab- 
rous, with or without a short awn: palet equalling the glumes. In fields 
and waste places: introduced from Furope. 
§ 3 CERATOCHLOA Beauv. as genus. Spikelets large, strongly 
compressed and more or less keeled. | 
B. marginatus Nees in Steud. Syn. Pl. Gram. 322. B. breviarista- 
tus Buckley. A densely tufted coarse perennial: stems erect ; 2-4 feet high, 
mostly pubescent or puberulent: sheaths pilose-pubescent: ligules 144-2 
lines long, laciniate: leaves somewhat sparsely pilose throughout, rather 
rough 6-12 inches long, 3-6 lines wide: panicle erect, rather narrow, usually 
4-8 inches long, the lower branches somewhat spreading in flower, 1-344 
inches long: bearing 2 spikelets: spikelets 1-2 inches long, lateral compress - 
ed, usually 7-9-flowered, erect or ascending: empty glume rather broad, 
scabrous, the first subacute, 3- or 5-nerved, 4-6 lines long, the second 
broader, obtuse, 6-7 lines long, 5-7-nerved, the lateral nerves broad; flow- 
ering glumes ovate-lanceolate, acute, coarsely pubescent, 6-8 lines long, 
7-nerved, with short hyaline, teeth at the apex: and a stout straight awn 
2-3 lines long: palets almost equalling the glumes. Common from Cali- 
fornia to Alaska and the Rocky: Mountains. . 
Var. latior Shear. |. c. 55 Larger and stouter: panicle larger with 
the lower branches 2-10 inches long, with the type. 
Var. seminudus Shear 1. c. 55. More leafy and less pubescent or 
nearly smooth, throughout: empty glumes glabrous or scabrous on the 
nerves. With the type: 
B. polyanthus Scribn. & Shear 1. c. 56. A rathes stout erect perennial: 
stems erect,emooth,or puberulent at the nodes, 2-3 feet a ae sheaths smooth, 
or sparsely pilose: ligules about 1 line long, rounded: leaves mostly scab- 
rous: panicle elongated, erect, its branches usually short and erect or slight- 
ly spreading; spikelets 144-2 incnes long, 7-11-flowered: empty glumes 
broad, smooth or somewhat scabrous, the first 3-nerved, 3-4 lines long, the 
second 4-7-nerved, obtuse, 6-614 lines long: flowering glumes 7-nerved, 6-9. 
lines long, smooth or scabrous, obtuse, emarginate, with broad hyaline 
margins: awn 2-4 lines long. Washington to California and Wyoming. 
B. Sitchensis Bong. Veg. Sitch. 173. Stems stout, leafy, smooth, 4-6 
feet high; from a perennial root: sheaths shorter than the internodes, 
smooth: ligules large, rounded, entire or somewhat lacerate, 144-24 lines 
long: leaves 8-16 inches long, 5-7 lines wide, sparingly pilose above, 
smooth beneath: panicle large, lax, drooping, 10-14 inches long: its lower 
