116 



Fig. no. MTJHXENBERGIAVIRESCENS(H.B.K.) Trill. Unifl. 193. 1824. 

 {Podosiemum rvr^rcns H. B. K. Nov. Gen. ft Sp. PLl: 132. 1815. i-A rather 

 slender, erect perennial about 6 dm. (2° j high, with long, narrow, flat leaves and 

 a strict, pale-green or straw-colored panicle about 15 cm. i6') long. Panicle 

 branches 2-5 cm. (l'-2'j long, flower bearing to the base. Spikelets ia) about 

 4 mm. (2") long; empty glumes (b) unequal, the flrst 1-nerved, the longer second 

 glume 3-nerved, lanceolate, acute or slightly 3-toothed; flowering glume (c) 

 and palea pubescent in the lower half; awn flexuose, 10-16 mm. i4"-6") long.— 

 At an altitude of 1.800 to 2,400 m. (6,000O-8,000°j on the mountains of Arizona 

 and New Mexico, i Mexico, i May to June. 



