163 



Fig. 157. DESCHAMPSIA CALYCINA Presl, Rel. Haenk. 1:251.1880. (Aira 

 danthonioides Trm. Mem. Acad. St. Petersb., VI., Sei. Math. Phys.et Nat., l: 57. 

 1831.) OAT-LIKE HAIR-GRASS.— A rather slender, erect, caespitose grass 1-7 

 dm. (3°-2i°) high, with more or less spreading panicles. Spikelets (a) 6-8 mm. 

 (3"-4") long with linear-lanceolate, 3-nerved, and nearly equal empty glumes; 

 flowering glumes (b, c) 2-3 mm. {1"-U") long, awned just below the middle; awn 

 3-4 times the length of the glume.— Native along the Pacific Slope from Can- 

 ada to California, eastward to Utah, and southward through Mexico to Peru. 

 April to July. 



