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.) 



divaricate branches from all the nodes, the ultimate branches in 

 short dense fascicles. Ql — Low or swampy woods, Coastal Plain, 

 southeastern Virginia to Florida, west to Arkansas and Texas; 

 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. Ql — 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.) 



