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



ascending or somewhat topheavy-reclining, not spreading or mat- 

 like; blades very numerous, flat, appressed, rather thin and papery. 

 % — Sandy pine woods, Coastal Plain, New Jersey to northern 

 Florida and Texas; Tennessee (Knoxville); Nicaragua (fig. 1298). 



18. Panicum fusiforme Hitchc. (Fig. 1299.) Vernal phase as in 

 P. angustijolium; culms 30 to 70 cm tall, the basal and lower blades 

 softly pubescent beneath; spikelets 3.3 to 3.5 mm long, elliptic, 



Figure 1291.— Panicum aciculare. Plant, X 1; two views of spikelet, and floret, X 10. (Vernal phase, 

 Chase 7148, N.C.; autumnal phase, Hitchcock 317, N.C.) 



acutish or beaked beyond the fruit, long-attenuate at base, papil- 

 lose-villous. Autumnal phase bushy, the blades soon involute, 3 to 

 5 cm long. % — Sandy pine woods, southern Georgia to Florida 

 and Mississippi; West Indies; British Honduras (fig. 1300). 



19. Panicum arenicoloides Ashe. (Fig. 1301.) Vernal phase 

 intermediate between that of P. angustijolium and P. aciculare; 

 culms 30 to 50 cm tall; lower sheaths and blades softly villous; blades 



Figure 1292. — Distribution of 

 Panicum aciculare. 



Figure 1293.— Panicum chrysopsidifol- 

 ium. Two views of spikelet, and 

 floret, X 10. (Type.) 



Figure 1294.— Distribution of 

 Panicum chrysopsidifolium. 



7 to 12 cm long, 3 to 4 mm wide, apex subinvolute; panicle 4 to 6 

 cm long, the lower branches ascending; spikelets 2.1 to 2.5 mm long, 

 obovate, papillose-pilose. Autumnal phase bushy-branching, erect or 

 topheavy, the blades involute. % — Sandy pine woods, Coastal 

 Plain, North Carolina to Florida, Arkansas, and Texas; Cuba; Guate- 

 mala (fig. 1302). 



20. Panicum ovinum Scribn. and Smith. (Fig. 1303.) Vernal 

 culms erect or nearly so, not densely tufted, glabrous, 30 to 50 cm 

 tall; sheaths glabrous or the lowermost appressed-pubescent ; blades 



