21 



Fig. 15. ANDROPOGON NUTANS AVENACEUS (Michx.) Hack, in DC. 

 Monog. Phan. 6 : 530. 1889. {A. arenaceits Michx. Fl. Bor. Am. 1 : 58. 1803: Sor- 

 ghum avenaceum Chapm. 1860; Chryso])ogon avenaceus Benth. 1881.) INDIAN 

 GRASS or BUSHY BLUE-STEM.— A stout perennial 12-18 dm. (40-6°) high, with 

 long leaf blades, and long, rather dense, usually .somewhat nodding brownish 

 panicles. Spikelets (a) 6-8 mm. (3"-4") long; awn of the fourth glume (e) 

 9-20 mm. (4i"-10") long; first, second, third, and fourth glumes (6, c, d, e) nearly 

 equal in length.— Dry fields, glades, and borders of woods, Ontario to South Da- 

 kota and Manitoba, south to Florida, Texas, and Arizona. (Mexico, Central and 

 South America.) July to October. 



Abundant on the western prairies and highly valued for hay. 



In variety lixn^anus Hack. 1. c. (Sorghum nutans, Cha-p-m.) the awns are 

 24-30 mm. (12"-15"j long. 



