311 



Fig. 607. Hordeum adscendens HBK. Nov. Gen. 1 : 180. 1815. 

 Scribn. & Smith, U. S. Dept. Agr., Div. Agros. Bull. 4 : 24. 1897.— 

 A rather slender, erect, leafy annual (?) 6 to 9 dm. high, with 

 pubescent lower sheaths, flat and rather rigid leaves, and bearded, 

 terminal spikes 6 to 8 cm. long. Empty glumes setaceous, rounded 

 on the back, grooved on the inner face below; those of the cen- 

 tral spikelet about 2 cm. long. Flowering glume of the central 

 spikelet 9 to 10 mm. long, with an awn 20 to 24 mm. long. Lateral 

 spikelets neutral. — Along irrigating ditches, Arizona. [Mexico.] 

 April-June. 



