15 



Fig. 311. Andropogon hirtiflorus oligostachyus (Chapm.) 

 Hack, iu 1). C. Monog. Phan. 6:372. (Andropogon oligostachyus 

 Chapm.) A slender perennial G to 12 dm. liigh, with narrow 

 leaves and slender racemes 5 to 6 cm. long. Sessile spikelet (a) 

 6 to 7 mm. long with the first glnme (h) liirsute, and the deeply 

 cleft fourth glume (e) bearing a slender, geniculate awn about 15 

 mm. long. Florida, Arizona. [St. Domingo and Mexico.] July- 

 Septemher. 



