734 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



FIGURE 1635. Distribution of 

 Andropogon furcatus. 



91 (A provincialis Lam.? not Ketz.) Dry soil, prairies, and open 

 woods, Quebec and Maine to Saskatchewan and Montana, south to 

 Florida, Wyoming, Utah, and Arizona; Mexico (fig. 1635). An impor- 

 tant forage grass in the prairie States of the Mississippi Valley. 



12. Andropogon hallii Hack. TURKEYFOOT. (Fig. 1636.) Re- 

 sembling A. Jurcatus, but with creeping rhizomes; racemes conspic- 

 uously villous, the hairs 



grayish to pale golden; awn 



of sessile spikelet rarely 



more than 5 mm long, 



often obsolete. 91 



Sandhills and sandy soil, 



North Dakota and eastern 



Montana to Texas, Wyo- 

 ming, Utah, and Ari- 

 zona; Iowa (fig. 1637). 

 Intergrades with A 

 jurcatus . A form with 

 yellow-villous racemes 

 and awns 5 to 10 mm 

 long has been segre- 

 gated as A. chrysoco- 

 mus Nash. 



13. Andropogon 

 mohrii Hack. (Fig. 

 1638.) Culms stout, 

 compressed, tufted, 

 erect, 80 to 130 cm FIGURE 

 tall, the upper half hallii > x i. (Hitchcock 

 sparingly to rather 

 freely branching; 

 leaves villous, the 

 lower sheaths 

 strongly keeled and 

 glabrous at base, the 

 blades elongate, 3 to 

 5 mm wide; inflo- 



FIQURE m& -Andropogon mohrii, X 1. pescenCG naiTOW 



FIGURE 1637. Distribution of 

 Andropogon hallii. 



branches approximate, the ultimate branch- 

 lets short, densely bearded at summit, the purplish spathes 4 to 6 cm 

 long; racemes mostly 4, tawny, 2 to 4 cm long, on peduncles mostly 

 about 2 cm long, or the terminal ones sometimes long-exserted; rachis 

 scarcely flexuous, the joints shorter than the spikelets, copiously 

 long-vOlous; sessile spikelet 4 to 5 mm long, the awn loosely twisted 

 below, 1.5 to 2 cm long; pedicel long- villous, the spikelet reduced to a 

 minute glume. 9[ Wet pine woods and sandy seacoast, North 

 Carolina to Georgia and Louisiana (fig. 1639). 



14. Andropogon cabanlsii Hack. (Fig. 1640.) Culms in small 

 tufts, erect, 80 to 150 cm tall, the upper half bearing long slender 

 branches; sheaths villous to nearly glabrous; blades 2 to 3 mm wide; 

 inflorescence loose; racemes 2, pale grayish-tawny, with about 15 

 joints, 4 to 7 cm long on slender long-exserted peduncles, the spathes 



