MANUAL OF THE GRASSES OF THE UNITED STATES 



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glabrous; blades firm, stiffly ascending or spreading, 12 to 20 cm long, 

 9 to 13 mm wide, scabrous on the upper surface and toward the apex 

 beneath; panicle 8 to 12 cm long, few-flowered; spikelets 3 mm long, 

 elliptic, minutely pubescent, pointed beyond the fruit. Autumnal 

 culms branching from the middle nodes, the branches more or less 



Figure 1446.— Distribution of 

 Panicum scoparium. 



Figure 1447. — Panicum aculeatum. Two views 

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



divaricate, the ultimate panicles wmolly or partly included in the 

 sheaths. % —Swampy woods, Connecticut to North Carolina, rare 

 (fig. 1448). 



101. Panicum scabriusculum Ell. (Fig. 1449.) Vernal phase 

 grayish olive green; culms erect, 1 to 1.5 m tall, scabrous at least below 

 the nodes, sometimes puberulent; sheaths glabrous or more or less 



Figure 1449.— Panicum scabriusculum. 

 Two views of spikelet, and floret, 

 X 10. (Type.) 



Figure 1448.— Distribution of 

 Panicum aculeatum. 



hispid at least toward the summit, often mottled or white-spotted, 

 commonly swollen at the base and contracted toward the summit; 

 blades stiffly ascending or spreading, often reflexed, 15 to 25 cm long, 

 9 to 12 mm wide, glabrous or scabrous, often more or less pubescent 

 beneath, tapering to an involute point; panicle 10 to 20 cm long; 



spikelets 2.3 to 2.6 mm long, ovate, glabrous or 

 obscurely puberulent. Autumnal culms erect, 

 branching from the middle and upper nodes, the 

 branches appressed, finally forming dense ob- 

 long masses along the upper part of the primary 

 culm, the panicles partly or entirely enclosed in 

 the sheaths. Ql — Moist ground, especially 

 along ditches, streams, and swamps, Coastal 

 Plain, New Jersey to Florida and Texas (fig. 1450) 

 102. Panicum cryptanthum Ashe. (Fig. 1451.) Vernal culms 

 erect, 80 to 100 cm tall, glabrous except the usually bearded nodes; 

 sheaths glabrous or the lowermost sparsely hirsute, the upper some- 

 what inflated; blades stiff, glabrous, sparingly ciliate at base, 10 to 



55974°— 35 12 



Figure 1450.— Distribution of 

 Panicum scabriusculum. 



