POACEAE. 51 



9. B. grandis (Shear) Hitchc. Culms 1-1.5 m. high; sheaths 

 pubescent; blades pubescent, elongated, spreading, rather lax; 

 panicle broad, open, the branches slender and drooping, naked below, 

 the lower usually in pairs, as much as 15 cm. long; first glume usually 

 distinctly 3-nerved; floral glume densely pubescent over the back, 



Monterey to San Diego County on mountain slopes; Little Santa 

 Anita Canon and Mt. Wilson. 



10. B. laevipes Shear. Perennial; culms 6-13 dm, high, smooth; 

 sheaths smooth below or sparsely pilose, pilose at the throat; ligule 

 1-2 mm. long; leaves linear-lanceolate, 15-25 cm. long, 5-12 mm. 

 wide, usually scabrous above and glabrous beneath; panicle drooping, 

 15-25 cm. long; spikelets drooping, terete, acuminate, becoming 

 oblong-lanceolate and compressed, 2-3 cm. long, 6— 11-flowered; 

 empty glumes smooth, the first acutish, 12-14 mm. long, the second 

 9-12 mm. long; flowering glume obtuse, 7-nerved, 12-15 mm. long, 

 appressed ciliate-pubescent nearly to the apex; awn straight, 3-5 

 mm. long; palea slightly shorter than its glume. 



Frequent on wooded slopes and in canyons in all the mountains 

 and foothills. 



11. B. subvelutinus Shear. Perennial; culms 3-6 dm. high; 

 sheaths canescent; blades narrow, becoming involute, canescent 

 and pilose; panicle 5-10 cm. long, narrow, erect, the branches 

 short and erect; spikelets about 25 mm. long; glumes puberulent, 

 the first 3-5-nerved, 8-10 mm. long, the second 7-nerved, 10-12 

 mm. long; floral glume appressed-puberulent, 12-14 mm. long; awn 

 3-4 mm. long. 



This has been found in the mountains of Ventura and San Ber- 

 nardino Counties and is to be expected in the San Gabriel Mountains. 



12. B. marginatus Nees. Perennial; culms 6-12 dm. high, 

 mostly puberulent to pubescent; sheaths pilose-pubescent; ligule 

 3-3.5 mm. long; leaves rather sparsely pilose-pubescent through- 

 out and scabrous, 1.5-2.5 dm. long, 6-12 mm. wide; panicle erect, 

 1-2 dm. long, its lower branches 2-4, erect or spreading in flower, 

 unequal, the lowest about 7 cm. long and bearing 2 spikelets; spike- 

 lets 2.5-4 cm. long, 5-7 mm. wide, laterally compressed, 7-9-flow- 

 ered, erect or ascending; empty glumes scabrous to scabrous-pubes- 

 cent, the first subacute, 3-5-nerved, 7-9 mm. long, second 5-7- 

 nerved, 9-11 mm. long; flowering glume coarsely pubescent, acute, 

 11-14 mm. long, mostly 7-nerved, teeth very short, subacute; awn 

 4-7 mm. long; palea ciliate-pectinate on the keels, equaling its 

 glume or nearly so. 



Frequent in all the mountains in the pine belt and in the upper 

 portions of the chaparral belt on wooded slopes. 



13. B. carinatus H. & A. Annual or biennial; culm 5-8 dm. 

 high, slightly pubescent at the nodes; sheaths retrorsely soft pilose; 

 ligule 3-4 mm. long; leaves flat, mostly narrow, 1-2.5 dm. long, 

 3-6 mm. wide, sparsely pilose on both sides; panicle rather lax, 

 1-2.5 dm. long, lower branches 3, spreading or drooping; spikelets 

 compressed, 2.5-3 cm. long, 5 mm. broad, 5-9-flowered; empty 

 glumes lanceolate, acute, glabrous to slightly scabrous-pubescent, 

 the first 3-5-nerved, 7-9 mm. long, second 5-7-nerved, 9-10 mm. 



