POACEAE. 29 



most about 15 cm. long, nearly filiform and rigid, all slightly scabrous 

 on both surfaces and margins; ligule short; sheaths rather loose, 

 the uppermost dilated, smooth except the margins, these ciliate, 

 especially at the throat; panicle 3-5 dm. long, at length exserted 

 and loose, narrow with erect branches; spikelets short-pedicelled; 

 empty glumes acuminate and bristle-pointed, slightly scabrous on 

 the nerves, the lower 16 mm. long, the upper 12 mm, long; flowering 

 glume 10 mm. long, silky-pubescent; awn about 25 mm. long, slender, 

 bent below the middle and minutely scabrous; palea about half the 

 length of its glume; anthers naked. 



Frequent on dry open ridges in the chaparral belt. Santa 

 Monica, Santa Ana and San Gabriel Mountains; also in the foot- 

 hills of San Diego County. 



4. S. parishii Vasey. Culms tufted, leafy below, 3-4.5 dm. 

 high, rather stout; sheaths smooth, longer than the internodes, the 

 margins of the throat pubescent; blades involute, rigid, smooth 

 below, scabrous above, the lower ones 12-18 cm. long, the upper 

 8-10 cm. long; panicle included at base by the somewhat inflated 

 upper sheath, 12-15 cm. long, open; the lower branches in 3's, the 

 upper in 2's or single, rather few-flowered; empty glumes linear- 

 lanceolate, smooth, first 12-16 mm. long, second about 2 mm. 

 shorter; flowering glume about 7 mm. long, silky with white hairs 

 often 5 mm. long, 2-toothed; awn 16-20 mm. long, smooth below, 

 scabrous above. 



Occasional in the San Bernardino and San Jacinto Mountains, 

 5000-7000 feet altitude, Parish, Hall 



5. S. setigera Presl. Culms 3-9 dm. high, tufted, rather stout, 

 pubescent at the nodes; sheaths hairy at the throat, the lower 

 shorter than the internodes; basal leaves \ as long as the culms; 

 culm-leaves flat, 4-6 mm. wide, the uppermost nearly equaling the 

 panicle; hgule about 2 mm. long, truncate; panicle 10-25 cm. long, 

 mostly included below, loose, flexuous, more or less secund when 

 young, the slender branches in pairs; pedicels shorter than the 

 spikelets; empty glumes 12-18 mm. long, long-acuminate; flowering 

 glume 10 mm. long, silky-hairy on the nerves; awn geniculate above 

 the middle, bent again, twisted and pubescent below, 6-10 cm. long; 

 anthers bearded at the apex. 



Common on the mesas, grassy hills, and in open places in the 

 chaparral belt. 



6. S. eminens Cav. Culms tufted, slender, 3-9 dm. high, pubes- 

 cent at the nodes; leaves convolute-setaceous, basal ones about 

 half as long as the culm, lower culm leaves 15-20 cm. long, the 

 uppermost 5 cm. long; ligule very minute; sheaths striate, smooth; 

 panicle 10-15 cm. long, exserted, somewhat secund, the very slender 

 short rays in pairs, few-flowered; lower glumes about 10 mm. long, 

 the upper 8 mm. long, acuminate, purplish; flowering glume 5-6 mm. 

 long, pubescent; awn about 25 mm. long, slender, bent near the 

 middle, minutely and evenly scabrous. 



Occasional on dry ridges in the chaparral belt about Pasadena 

 and San Diego. 



6a. S. eminens andersonii Vasey. Culms and leaves more 



