MANUAL OF THE GRASSES OF THE UNITED STATES 



669 



127. Panicum hirticaule Presl. (Fig. 1493.) Culms usually 

 simple or nearly so, 15 to 70 cm tall, papillose-hispid to nearly gla- 

 brous; blades 5 to 15 cm long, 4 to 13 mm wide, often cordate at 

 base, sparsely hispid or nearly glabrous, ciliate toward base; panicles 

 5 to 15 cm long, scarcely one-third the entire height of the plant; 

 spikelets 2,7 to 3.3 mm long, lanceolate-fusiform, acuminate, usually 



FIGURE 1492 . Panicum hillmani. 

 Two views of spikelet, and floret, 

 X 10. (Type.) 



FIGURE 1 4 9 3 . Panicum hirticaule. 

 Two views of spikelet, and floret, 

 X 10. (Type.) 



reddish brown; first glume half to three-fourths the length of the 

 spikelet; fruit 2 mm long, o Rocky or sandy soil, Arkansas 

 and western Texas to southern California; Mexico to Colombia 

 (fig. 1494). 



128. Panicum pampinosum Hitchc. and Chase. (Fig. 1495.) 

 Resembling P. hirticaule, but freely branching; spikelets very turgid, 

 about 4 mm long; first glume more than three-fourths the length of 

 the spikelet; fruit 2.2 mm long, o Mesas, New Mexico and 

 Arizona; Mexico. 



129. Panicum stramineum Hitchc. and Chase. (Fig. 1496.) Re- 

 sembling P. hirticaule, but freely branching and nearly glabrous through- 

 out; blades longer; spikelets more tur- 

 gid, less pointed, 3.2 to 3.7 mm long, the 



first glume about one-third the length 



of the spikelet; fruit 2.2 mm long, with 

 a prominent lu- 

 nate scar at base. 

 O Rich bot- 

 tom lands and 

 damp soil, south- 

 Arizona; 



ern 



northwestern 



Mexico. 



130. Panicum 

 miliaceum L. 



ROOMCORN MILLET. (Fig. 1497.) 



FIGURE 1494. Distribution of 

 Panicum hirticaule. 



FIGURE 1 49 5 .Panicum pampinosum. 

 Two views of spikele t, and floret, X 10. 



(Type.) 



Culms stout, erect or decumbent at 

 base, 20 to 100 cm tall; blades more 

 or less pilose on both surfaces or glabrate, as much as 30 cm long 

 and 2 cm wide, rounded at base; panicles usually more or less 

 included at base, 10 to 30 cm long, usually nodding, rather compact, 

 the numerous branches ascending, very scabrous, spikelet-bearing 

 toward the ends; spikelets 4.5 to 5 mm long, ovate, acuminate, 

 strongly many -nerved; fruit 3 mm long, stramineous to reddish 



