170 



Fig. 1G4. TKISETUM CEKNUUM Trin. Mem. Acad. Petersb. VI., Sci. Math. 

 Phys. etXat. 1: Gl. 1831. NODDING OAT-GRASS.— A slender perennial 0-10 

 dm. (20-3i°j high, with rather broad, flat leaves and loosely flowered, nodding 

 panicles 12-20 cm. (.5'-8') long. Spikelets (a) 6-8 mm. (3"-4") long, 2-, 3-, or 

 rarely 4-flowered; first glume acute, 2-3 mm. (I'Mi") long, hispid on the keel; 

 second glume obtuse or acute, 4 mm. (2") long; flowering glumes (6) scabrous, 

 with few hairs at the base, oval-lanceolate, obscurely 5-nerved, cleft at the 

 apex; awn arising below the base of the cleft, 6-10 mm. (3"-5") long.— Alaska 

 to northern California and eastward to Idaho. May to July. 



