54 Festuceae 



4. B. Trinii pallidiflorus Desv. A more robust and larger 

 plant, 6-12 dm. high; sheaths pilose-pubescent; leaves broadly 

 linear-lanceolate, smooth or somewhat sparsely pilose-pubescent; 

 panicle more elongated, mostly 2-4 dm. long; branches mostly 

 6-12 at the lower whorls, weak and spreading. 



Same range as the last and apparently more common. 



** Awns stout, straight. 

 *- Awns over 1 cm. long. 



5. B. Madritensis L. Annual; culms 3-7 dm. high, smooth; 

 sheaths smooth or the lower sparsely pubescent; ligule about 2 

 mm. long; leaves linear, puberulent or nearly smooth, 5-15 cm. 

 long, 2-4 mm. wide; panicle erect, 5-12 cm. long, lower branches 

 2-4, 1-3 cm. long, unequal, spreading in flower, slender; spikelets 

 3-4 cm. long, nearly smooth or scabrous-puberulent, 7-11-flower- 

 ed; empty glumes lanceolate, acuminate, the first 1-nerved, 9-12 

 mm. long, the second 3-nerved, 13-16 mm. long; flowering glume 

 linear-lanceolate, 15-18 mm. long, glabrous or scabrous; awn 

 stout, tapering, rough, somewhat curved, 16-22 mm. long; palea 

 pectinate-ciliate on the keels, equaling the insertion of the awn. 



Santa Ana Mountains, on the Santiago Peak trail, altitude 3000 feet. 



6. B. maximus Gussoni Parl. Annual; culms erect or as- 

 cending, 4-7 dm. high, smooth; sheaths pilose-pubescent; ligule 

 3-4 mm. long; leaves linear, 2-3 dm. long, 3-5 mm. wide, pilose 

 on both sides; panicle somewhat drooping, secund, lax, 1-2 dm. 

 long; lower branches 2-4, 3-5 cm. long; spikelets 5-7-flowered, 

 3.5-5 cm. long; empty glumes lanceolate, acuminate, smooth, the 

 first 15-20 mm. long, 1-nerved, the second broader, 25-30 mm. 

 long, 3-nerved; flowering glume 5-nerved, 25-30 mm. long, 

 strongly scabrous, 2-toothed, teeth hyaline, 3-4 mm. long; awn 

 stout, 3.5-4.5 cm. long, rough; palea somewhat shorter than its 

 glume. 



Common along streets and in waste places. 



7. B. rubens L. Annual; culms about 2-5 dm. high, erect, 

 puberulent above; sheaths pubescent; ligule 1-2 mm. long, leaves 

 3-15 cm. long, pubescent on both sides; panicle erect, compact, 

 usually purplish, 4-7 cm. long; spikelets mostly 7-11-flowered, 

 2-2.5 cm. long; empty glumes acuminate, pubescent or scabrous, 

 the first narrow, 1-nerved, 7-9 mm. long, the second 3-nerved, 

 10-12 mm. long; flowering glume 13-16 mm. long, lanceolate, 



