iia 



Fig. 107. MTTHXiENBERGlA PUNGENS Thurb. in Gray, Proc. Acad. Nat. 

 Sci. Phila. 1863 : 78. 1863.— A rigid, native perennial 3-4.5 dm. (I'i'-lS') high, 

 with rigid, sharp-pointed leaves and open panicles about 15 cm. (6') long. 

 Primary branches of the panicle solitary, 5-7 cm. (2'-2i') long with spreading 

 secondary branches to near their base in partially expanded panicles; these 

 branches appear fasciculate. Spikelets (a) 4-5 mm. (2"-2i") long, long-pedicel- 

 late; empty glumes bristle-pointed, about one-half as long as the short-awned 

 flowering glume {b). Palea 2-toothed.— Dry soil, sand hills and plains, Nebraska 

 to Utah, Texas and Arizona. July to October. 

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