.") i 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 <lni. long; branches mostly 

 <i— 1 :2 at the lower whorls, weak ami spreading. 



e range as tin last and apparently more common. 



** Awns stout, straight. 

 •*- A Hi,.-- o-ffer l 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 eni. long, unequal, spreading in flower, slender; spikeletfi 

 3-4 em. 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 3(100 feet. 



6. B. maximus Gussoni Pari. 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-rlowered, 

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

 first 15-20 min. 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 2-6 din. high, erect, 

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

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

 usually purplish, 1-7 cm. long; spikelets mostly 7-11-flowered, 

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

 the firsl narrow, i-nerved. 7-8 mm. long, the second 3-nerved, 

 10-12 ram. long; flowering glume L3-16 mm. long, lanceolate. 



