36 Agrostideae 



awns; empty glumes pubescent or ciliate, obtuse, elliptic ; awns 

 4 mm. long; flowering glume 1 mm. long, hyaline, truncate- 

 jagged ; awn equaling or shorter than the glume or wanting ; 

 palea 2-toothed. 



Common in low moist places along the coast and along streams through- 

 out our range, ascending the mountains to the pine belt. 



2. P. littoralis Sin. Perennial, 3-6 dm. high, ascending 

 from rootstocks; sheaths nearly equaling the internodes, the 

 upper slightly inflated; leaves flat, scabrous; panicle dense, 

 somewhat lobed, 4-8 cm. long; spikelets 2-2.5 mm. long; awns 

 equaling the empty elliptic glumes; flowering glume 1 mm. 

 long, truncate, hyaline, its awn nearly twice as long; palea 

 2-toothed. 



Occasional along streams in the valleys and foothills. 



17. AGBOSTIS L. BENT-GRASS. 



Annual or perennial grasses with flat or bristle-like 

 leaves and paniculate inflorescence. Spikelets 1-flow- 

 ered. Glumes 3 ; the 2 outer empty, membranous, 

 keeled, acute ; the third shorter, obtuse, hyaline, some- 

 times bearing a dorsal awn, subtending a perfect flower. 

 Palea shorter than the glume, sometimes minute or 

 wanting. Stamens generally 3. Styles short, distinct. 

 Grain free, enclosed in the glume. 



1. A. verticillata Vill. Perennial from slender rootstocks; 

 culms decumbent, 3-6 dm. high, often rooting from the lower 

 nodes; sheaths inflated, smooth; leaves 5-10 cm. long, 2-6 mm. 

 wide, scabrid above; panicle loosely contracted, 4-10 cm. long, 

 8-12 mm. wide; empty glumes nearly equal, obtuse, 1-nerved, 

 scabrous ; callus naked ; flowering glume 1 mm. long, 5-toothed, 

 glabrous ; palea nearly equaling the glume. 



Common along streams in the mountains and valleys throughout our 

 range. Native of southern Europe. 



2. A. asperifolia Trin. Annual; culms erect, tufted, leafy, 

 3-6 dm. high ; sheaths minutely scabrid ; leaves 7-15 cm. long, 

 3-5 mm. wide, scabrous; panicle interrupted, lobed and dense 

 above, 10-15 cm. long; branches crowded, erect; spikelets 2.5-3 

 mm. long; empty glumes nearly equal, scabrous on the nerves; 



