25 



A more robust and larger plant, 6-12 <ini. high, with a much elongated panicle 

 mostly 2-4 dm. long; with branches mostly 6-12 at the lower whorls, weak and 

 spreading; leaves broadly linear lanceolate, smooth or somewhat sparsely pilose- 

 pubescent, as are also the sheaths. 



Ty])e from the Andes of southern Chile. 



General distribution: Southern California to southern Chile. 



Specimens examined. — California: Near Pasadena (O. D. Allen in 1885); Chollos 

 Valley, San Diego (C. E. Orcutt 1064); San Diego (D. Cleveland in 1882); San 

 Nicholas Island (Blanche Trask 15). 



9/:;. BBOMUS TRINII EX- 

 CELSUS n. var. 



A stout perennial (?) 5-7 dm. high. 

 Leaves and sheaths short 

 pilose - pubescent. Panicle 

 rather narrow, nearly erect 

 1.5-2 dm. long; branches nu- 

 merous, ascending, 2-8 cm. 

 long. Spikelets oblong-lanceo- 

 late, carinate, 2-2.5 cm. long, 

 5-6 mm. wide; empty glumes 

 lanceolate-acuminate, smooth, 

 the lower 3-nerved, 13-15 mm. 

 long; flowering glume 7- 

 nerced, 10-12 mm. long, sparse- 

 ly pilose-pubescent, bidentate 

 at the acute apex; teeth 1-2 

 mm. long; awn 10-12 mm. 

 long, somewhat twisted at the 

 base, and divaricate. 



Type iNo. 522, collected by Coville 

 & Funston in the Panamint 

 Mountains, InyoCoimty, Cali- 

 fornia; altitude 1,700 m. 



This plant, which is the only one 

 of this form seen, is somewhat 

 anomalous and may prove to 

 be a good species. The spike- 

 lets and glumes are conspicu- 

 ously wider than in the 

 species, the florets more 

 crowded, and the awn shorter. 



III. STENOBKOMUS Griseb. 



Fig. 9. — Bromus trinii: a, empty glumes; 6, portion of a 



Annual or biennial plants, with 'P^''^^'^* showing flowering glumes. 



mostly 7iarrow spikelets and glumes and rather long aums. Chiefly natives of the Mediterra- 

 nean region of Europe and Africa. Introduced in this country. 



10. BROMUS MADRITENSIS L. Cent. PL 1 : 5. 1755. (Fig. 10.) 



A tufted annual, with an erect, rather dense panicle. Culm 3-7 dm. high, erect or 

 somewhat geniculate at the base, smooth. Sheaths smooth or the lower slightly 

 pubescent; ligule about 2 mm. long, subtruncate and lacerate; blades linear, 

 puberulent or nearly smooth, 5-15 cm. long, 2-4 mm. wide. Panicle erect, 6-12 

 cm. long, oblong-ovoid in outline, lower branches 2-4, 1-3 cm. long, unequal, some- 



