MANUAL OF THE GRASSES OF THE UNITED STATES 649 



puberulent to nearly glabrous; blades stiffly spreading, 2.5 to 8 cm 

 long, 2 to 5 mm wide, glabrous; panicle 3 to 7 cm long; spikelets 2.4 

 to 2.6 mm long, obovate, turgid, puberulent to nearly glabrous. 

 Autumnal phase, decumbent or spreading, branching from the middle 

 and upper nodes, the branches appressed. % — Dry sand, espe- 



Figure 1423.— Distribution of 

 Panicum patulum. 



Figure 1424. — Panicum webberianum. Two 

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



cially in "scrub", Georgia to Florida and Mississippi (fig. 1426). 



13. Oligosanthia.— Culms mostly relatively stout, usually erect; lig- 

 ules inconspicuous except in P. ravenelii; blades firm; spikelets 

 turgid, strongly 7- to 9-nerved. Autumnal culms with branches 

 more or less crowded toward the summit. 



Figure 1425.— Panicum patentifolium. 

 Two views of spikelet, and floret, X 10. 

 (Type.) 



Figure 1426. — Distribution of 

 Panicum patentifolium. 



89. Panicum wilcoxianum Vasey. (Fig. 1427.) Vernal culms 10 

 to 25 cm tall, copiously papillose-hirsute, as are sheaths and blades; 

 ligule 1 mm long; blades firm, erect, 5 to 8 cm long, 3 to 6 mm wide, 

 usually involute-acuminate; panicle 2 to 5 cm long; spikelets 2.7 to 



Figure 1428.— Distribution of 

 Panicum wilcoxianum. 



Figure 1427. — Panicum wilcoxianum. Two views 

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



3 mm long, papillose-pubescent. Autumnal culms branching from 

 all the nodes, forming bushy tufts with rigid erect blades. % — 

 Prairies, Manitoba, and North Dakota to Illinois and Kansas; New 

 Mexico (fig. 1428). 



