MANUAL OF THE GRASSES OF THE UNITED STATES 



735 



narrow, inconspicuous, or a few occasionally dilated; rachis not flex- 

 uous or but slightly so, the joints shorter than the spikelets, long- 

 villous; sessile spikelets 6 to 7 mm long, the first glume firm, sca- 

 brous and often 2-nerved between the keels, the awn twisted below, 

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

 slender glume or obsolete. % —Dry pine woods, peninsular Florida. 



15. Andropogon ternarius Michx. (Fig. 

 1641.) Culms tufted, erect, 80 to 120cm tall, 

 the upper half to two-thirds branching, the 

 branches usually long, slender and erect; leaves 

 often purplish-glaucous, glabrous, or the lower 

 loosely villous, the blades 2 to 4 mm wide; 

 inflorescence elongate, loose, of few to many 

 pairs of silvery to creamy or grayish feathery 

 racemes, usually on long-exserted peduncles 

 from slender inconspicuous spathes, some of the lateral peduncles 

 often short, from dilated spathes, rarely most of them so; racemes 

 3 to 6 cm long, with mostly less than 12 joints, the rachis not flexuous, 

 the joints shorter than the spikelets, copiously long-villous ; sessile 

 spikelets 5 to 7 mm long, glabrous and nerveless between the keels, 



Figure 1639.— Distribution of 

 Andropogon mohrii. 



Figure 1640. — Andropogon cabanisii, X 1. 

 (Fredholm 6416, Fla.) 



Mm 



?~ 



FlGUBE 1641. — Andropogon ternarius, X 1. 

 (Chase 4557, N.C.) 



the awn twisted below, 1.5 to 2 cm long; stamens 3; pedicel long- 

 villous, the spikelet obsolete or nearly so. % — Dry sandy soil, 

 open woods, mostly Coastal Plain, Delaware to Tennessee, Missouri, 

 and Oklahoma, south to Florida and Texas. (Fig. 1642). Variable in 

 the density and length of pubescence on the rachis and pedicels, the 

 less hairy specimens verging toward A. arctatus. 



65974°— 35 47 



