1 74 GBAMINEAE 



i/iaiiuico vjj ^ a. ^v, . fe , ^~ , - /S6 -~ 



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

 the second 12 to 15 lines long, 3-nerved ; lemmas 5-nerved, 12 to 15 lines long, 

 scabrous or puberulent, 2-toothed, the teeth iy 2 to 2 lines long ; awn stout, 1% 

 to 2 inches long. 



A weed in open ground and waste places, introduced from the Mediterranean 

 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. Washington to California and 

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

 middle and northern California. 



Refs. BROMUS VILLOSUS Forsk. Fl. Aeg. Arab. 23. 1775. B. maximus Desf. Fl. Atl. 1: 

 95. 1798; Thurb. in Wats. Bot. Cal. 2: 319. 1880; Davy in Jepson, Fl. W. Mid. Gal. 71. 1901. 

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

 gussonii Parl. Fl. Ital. 1: 407. 1848; Abrams, Fl. Los Ang. 54. 1904; Davy in Jepson, Fl. 

 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, ovoid, usually purplish, 

 11/2 to 3 inches long; spikelets 7 to 11-flowered, about 1 inch long; glumes 

 narrow, acuminate, pubescent or sometimes smooth, the first 1-nerved, 31/0 to 

 41/0 lines long, the upper 3-nerved, 5 to 6 lines long ; lemmas lanceolate, acute, 

 5-nerved, pubescent or smooth, 6 to 8 lines long, the apex deeply cleft into 2 

 long-acuminate hyaline teeth, 2 to 2% 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 Washington, occasional elsewhere; 

 introduced from southern Europe. 



Eefs. BROMUS RUBENS L. Cent. PI. 1: 5. 1755; Thurb. in Wats. Bot. Cal. 2: 319. 1880; 

 Davy in Jepson, Fl. W. Mid. Cal. 71. 1901 ; Abrams, Fl. Los Ang. 54. 1904. 



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

 smooth, slender; sheaths and blades pubescent; panicle broad, rather dense, 

 drooping. 2 to 6 inches long, the branches slender; spikelets nodding, linear, 

 becoming 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 lines long; 

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

 apex ; awn straight, 6 to 7 lines 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. 



Locs. Yreka, Butler 474, 816, 860; Montague, Heller 8012; Castella, Piper 6337; Tahoe, 

 Hitchcock 3113; Northfork, Griffiths 4592; Santa Barbara, Chase 2571. 



Ref. BROMUS TECTORUM L. var. NUDUS Klett & Richter, Fl. 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, 

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

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

 pyramidal, erect, 4 to 6 inches long, the branches few, divaricate and rather 

 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 



