258 



Fig. 554. Poa gracillima Vasey. Contrib. Xat. Herb. 1 : 272. 

 1893. Slender Spear-grass.— A smooth, densely tufted, erect 

 perennial, with soft, narrow, flat leaves and open panicles 8 to 10 

 cm. long. Spikelets (a) 3-to5-flowered. 6 to 8 mm. long, with rather 

 distant florets, acute empty glumes and obtuse flowering glumes, 

 which are 3 to 4 mm. long and scabrous or pubescent on the keel 

 and nerves below. — Dry. rocky soil on ridges and mountain sides. 

 central and northern California to Washington and British Colum- 

 bia. May-August. 



