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



icle 6 to 12 cm. long; spikelets 2.6 to 

 2.8 mm. long. Autumnal culms erect 

 or leaning, branching from the middle 

 nodes, the secondary branches 

 crowded toward the summit. Oi 



Figure 1019. — Panicum mutabile. Two views of spike- 

 let, and floret, X 10. (Type.) 



— Woods and copses, Massachusetts 

 to Michigan and Oklahoma, south to 

 Florida and Texas. 



110. Panicum mutabile Scribn. and 

 Smith ex Nash. (Fig. 1019.) Vernal 

 phase blue green, glaucous; culms 

 solitary or few in a tuft, erect, 30 to 

 70 cm. tall; sheaths glabrous; blades 

 horizontally spreading, 6 to 15 cm. 

 long, 8 to 20 mm. wide, tapering to 

 both ends, glabrous, ciliate toward 

 the cordate base or the lower ciliate 

 nearly to apex; panicle 7 to 15 cm. 

 long; spikelets 2.9 to 3 mm. long. 

 Autumnal culms erect or reclining, 

 sparingly branched from the middle 

 and upper nodes. 01 — Sandy pine 

 woods or hammocks, Coastal Plain, 

 southeastern Virginia to Florida and 

 Mississippi. 



111. Panicum joorii Vasey. (Fig. 

 1020.) Vernal culms 20 to do cm. tall, 

 slender, spreading or ascending from 

 a decumbent base, at least the lower 

 internodes purplish red; sheaths gla- 

 brous; 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 divaricate branches from all 

 the nodes, the ultimate branches in 

 short dense fascicles. 0[ — Low or 

 swampy woods, Coastal Plain, south- 



Figuee 1020. — Panicum joorii. Two views of spikelet, 

 and floret, X 10. (Type.) 



eastern Virginia to Florida, west to 

 Arkansas and Texas; Mexico. 



Figure 1021. — Panicum equilaterale. Two views of 

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



112. Panicum equilaterale Scribn. 

 (Fig. 1021.) Vernal culms 25 to 70 

 cm. tall, stiff and erect; sheaths gla- 

 brous, the upper two often approxi- 

 mate; blades firm, widely spreading, 

 6 to 17 cm. long, 6 to 14 mm. wide, 

 the margins nearly parallel, glabrous, 

 often ciliate at the rounded or sub- 

 cordate base; panicle 5 to 10 cm. long; 

 spikelets 3.2 mm. long. Autumnal 

 culms erect or leaning, branching 

 from the upper and middle nodes. 

 01 — Pinelands, hammocks, and 

 sandy woods, Coastal Plain, North 



