Bent-grass Tribe 31 



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. 



6. 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; ligule 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. 



* Awn villous or pubescent, at least below. 



7. S. speciosa Trin. & Rupr. Perennial; culms tufted, erect, 

 2-5 dm. high; sheaths shorter than the internodes, the upper- 

 most inflated ; basal leaves half as long as the culms, scabrous, 

 culm leaves, usually 3, 5-15 cm. long, closely involute; panicle 

 often somewhat included, spike-like, 6-20 cm. long, the branches 

 usually in pairs, bearing 1-3 spikelets ; empty glumes nearly 

 equal, hyaline, acuminate, about 16 mm. long; flowering glumes 

 silky-pubescent, 8-12 mm. long, 2-toothed at the apex; awn 3-4 

 cm. long, geniculate below the middle, the twisted portion pilose 

 with white hairs 3-6 mm. long. 



Occasional on dry hillsides in the lower portions of the chaparral belt. 

 San Fernando Valley; Elsinore; San Bernardino; San Diego. 



8. S. viridula Trin. Culms stout, strict, simple, 4-7 dm. high ; 

 sheaths much shorter than the internodes; blades smooth or 



