174 GRAJIINEAE 



brau('lies i/i; to 1 inch loug; spikelets usually 5 to T-tlowered, li/o to 2 iuches 

 long ; glumes smooth, narrow, acuminate, the first 7 to 10 lines loug, 1-nerved, 

 the sec-oud 12 to 15 lines loug, 3-nerved ; lemmas o-uerved, 12 to 15 lines long, 

 scabrous or puberulent, 2-toothed. the teeth li/o to 2 lines long; awn stout, II/2 

 to 2 inches long. 



A weed in open ground and waste plui/es, introduced from the ilediterranean 

 region. Common from San Francisco south, infrequent northward. 



Var. gussonei Aschers. & Graebn. Differs in having a more open panicle, the 

 lower branches as much as 4 or 5 inches long. — AVashington to California and 

 Arizona, introduced from southern Europe. More connnon than the species in 

 middle and northern California. 



Refs. — Bkomus VILLOKUS Forsk. FI. Aeg. Aiali. 2.3. 177.'). B. ma.riinus Dosf. FI. Atl. 1: 

 9.5. 1798; Thurb. in Wats. Bot. Cal. 2: 319. ISSO; Davy in .Tepson, FI. W. Mid. Cal. 71. 1901. 

 Var. GUSSONEI Aschers. & Graebn. Syn. Mitteleur. FI. 2: 595. 1901. B. maximus Desf. var. 

 (jussonii Pari. FI. Ital. 1: 407. 1848; Abranis, FI. Los Aug. 54. 1904; Davy in Jepson, FI. 

 W. Mid. Cal. ed. 2. 70. 1911. 



11. B. rubens L. Culms 6 to 15 inches high, puberulent below the panicle; 

 sheaths and blades pubescent; panicle erect, compact. ovoi<l, usually purplish, 

 IV2 to 3 inches long; spikelets 7 to 11-flowered, about 1 inch long; glumes 

 narrow, acuminate, pubescent or sometimes smooth, the first 1-nerved, 31/^ to 

 41 o liues long, the upper 3-nerved. 5 to 6 lines long; lemmas lanceolate, acute, 

 5-uerved, pubescent or smooth. 6 to 8 lines loug, the apex deeply cleft into 2 

 loug-acLiminate liyaliue teeth. 2 to 21^ lines long; awn straight, 9 to 11 lines 

 long. 



Dry hills and in waste or cultivated ground : common especially in middle 

 and southern California: extends north to AVashington, occasional elsewhere; 

 introduced from southern Europe. 



Ecfs.— Bkomus rubex.s L. Cent. P). 1: 5. 17.»; Tluub. in Wats. Bot. Cal. 2: 319. 1880; 

 Davy in Jepson, FI. W. Mid. Cal. 71. 1901; Abraras, FI. Los Ang. 54. 1904. 



12. B. tectorum L. var. nudus Klett & Richter. Culms 1 to 2 feet high, 

 smooth, .slender; sheaths and blades pubescent; pauicle broad, rather dense, 

 droojung, 2 to 6 iuches long, the branches slender: spikelets nodding, linear, 

 liecouiing cuneiform in flower, 6 to 10 lines long; glumes narrow, acute, gla- 

 brous, the first 1-nerved, 2 to 3 lines long, the second 3-nerved, 4 to 5 liues long; 

 lemmas lanceolate, acute, glabrous, 5-nerved, 5 to 6 lines long, bidentate at 

 apex; awn straight, 6 to 7 liues long. 



Along roadsides, banks and waste places, introduced from Europe. B. tec- 

 torum is introduced here and there in the U. S. but has not been observed in 

 California ; it differs in having pubescent spikelets. 



Loes. — Yreka, Butler 474, 816, 860; Montague, Beller 8012; Castella, Tiper G337; Talioe, 

 Hitchcock 3113; Nortlifork, Gri'ffitha 4592; Santa Barbara, Chase 2571. 



Ref. — Beomus tectorum L. var. nudus Klctt iS: Richter, FI. Leipzig 109. 1830. 

 Division II. Perennials. Spikelets terete or somewhat compressed, not strongly 

 flattened. 



13. B. orcuttianus Vasey. Culms erect, leafy below, nearly naked above, 

 21/-0 to 3I/2 feet high, pubescent at and below the nodes; sheaths pilose or 

 more or less velvety; blades glaljrous, rather short and erect; panicle narrow- 

 pyramidal, erect, 4 to 6 inches loug, the branches few, divaricate and ratlier 

 rigid in fruit; spikelets 10 to 12 lines long, subterete, on short stout pedicels; 

 glumes narrow, smooth or scabrous, the first acute, 3 to 4 lines long, 1-nerved, 

 or sometimes with a faint lateral pair, the second broader, obtuse, 4 to 5 lines 



