MANUAL OF THE GRASSES OF THE UNITED STATES 657 



the lower internodes purplish red; sheaths glabrous; blades 6 to 15 

 cm long, 7 to 18 mm wide, thin, often subfalcate, glabrous on both 

 surfaces; panicle loosely flowered, 5 to 9 cm long; spikelets 3 to 3.1 

 mm long. Autumnal culms widely spreading, bearing more or less 



FIGURE 1455. Panicum commutatum. Plant, X 1; two views of spikelet, and floret, X 10. 

 (Bock and Chase 118, 111.) 



all the nodes, the ultimate branches in 



Low or swampy woods, Coastal Plain, 



Florida, west to Arkansas and Texas; 



divaricate branches from 

 short dense fascicles. 91 

 southeastern Virginia to 

 Mexico (fig. 1460). 



107. Panicum equilaterale Scribn. 

 (Fig. 1461.) Vernal culms 25 to 70 cm 

 tall, stiff and erect; sheaths glabrous, 

 the upper two 



often approxi- 

 mate; blades 



firm, widely 



spreading, 6 to 



17 cm long, 6 to 



14 mm wide, the 



margins nearly 



parallel, gla- 

 brous, often ciliate at the rounded or subcordate base; panicle 5 to 

 10 cm long; spikelets 3.2 mm long. Autumnal culms erect or lean- 

 ing, branching from the upper and middle nodes. 01 Pinelands, 

 hammocks, and sandy woods, Coastal Plain, North Carolina, South 

 Carolina, and Florida. 



FIGURE 1456. Distribution of 

 Panicum commutatum. 



FIGURE 1457. Panicum mutabile. Two 

 views of spikelet, and floret, X 10. (Type.) 



