264 



Fig. 560. Poa argentea Howell. Bull. Torr. Bot. Club 15 : 11. 

 1888; "Vasey, 111., N. Am. Grasses, 2: Xo. 72. Silvery Blue- 

 grass. — A slender, smooth, densely crespitose, erect perennial 1.5 

 to 2.5 dm. high, with flat leaves and narrow, oblong, rather loosely 

 flowered panicles 2 to 1 cm. long. Spikelets (a ) oblong-lanceolate, 

 2- to 3-flowered, 6 to 7 mm. long, with thin, oblong, obtuse glumes, 

 the floral ones (b) smooth, 4 to 5 mm. long. — In the mountains 

 of western Oregon. Julv. 



