624 MISC. PUBLICATION 200, U. S. DEFT. OF AGRICULTURE 



4. Bicknelliana. In small tufts, erect or ascending; sheaths gla- 

 brous; ligules nearly obsolete; panicles few-flowered; spikelets 

 long-pediceled, 7-nerved. Autumnal culms sparingly branch- 

 ing from upper or middle nodes, the blades not much reduced. 

 Intermediate in habit between Depauperata and Dichotoma. 

 22. Panicum bicknellii Nash. (Fig. 1306.) Vernal phase bluish 



green; culms 30 to 50 cm tall; nodes sparsely bearded or glabrous; 



FIGURE 1301. Panicum arenicoloides. 

 Two views of spikelet, and floret, X 

 10. (Type.) 



FIGURE 1302. Distribution of 

 Panicum arenicoloides. 



blades stiffly ascending, 8 to 15 cm long, 3 to 8 mm wide, the upper- 

 most usually the longest, narrowed toward the usually ciliate base; 

 panicle 5 to 8 cm long, the branches ascending; spikelets 2.3 to 2.8 

 mm long, sparsely pubescent or rarely glabrous. Autumnal culms 

 erect, forming a loose bushy tuft, the stiffly ascending blades not much 

 reduced, overtopping the narrow few-flowered panicles. 01 Dry 



FIGURE 1304. Distribution of 

 Panicum ovinum. 



FIGURE 1303. Panicum ovinum. Two 

 views of spikelet, and floret, X 10. 

 (Type.) 



sterile or rocky woods, Connecticut and Michigan to Georgia and 

 Missouri (fig. 1307). 



23. Panicum calliphy Hum Ashe. (Fig. 1308.) Vernal phase yellow- 

 ish green; culms 35 to 50 cm tall; nodes sparsely villous; blades 

 ascending, 8 to 12 cm long, 9 to 12 mm wide, ciliate at the rounded 

 base; panicle 7 to 9 cm long, with a few ascending branches; spikelets 

 mostly 3 mm long, elliptic, sparsely pubescent. Autumnal culms 



sparingly branching from the middle nodes, 

 the branches about as long as the inter' 

 nodes, erect. 01 Woods, rare and local, 

 Ontario, Massachusetts, New York, Ohio. 

 5. Nudicaulia. A single rare and local 



species. 



24. Panicum nudicaule Vasey. (Fig. 



FIGURE ms.-panicum neuranthum. 1309.) Vernal culms erect from a some- 

 Two views of spikelet, and floret, what spreading base, 40 to 60 cm tall, 



glabrous; sheaths glabrous; blades erect, 



rather thick, 4 to 10 cm long, 5 to 8 mm wide, the uppermost re- 

 duced, giving the culm a naked appearance; panicle long-exserted, 4 

 to 7 cm long, few-flowered, the branches ascending; spikelets 2.7 to 

 2.9 mm long, narrowly ovate, acuminate, glabrous. Autumnal phase 



