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



dense cushion. 9t Wet saline soil in the immediate vicinity of 

 geysers and hot springs, ascending to 2,500 m, Alberta to Washing- 

 ton, south to Wyoming and California (fig. 1370). 



56. Panicum languidum Hitchc. and Chase. (Fig. 1371.) Vernal 

 culms 25 to 40 cm tall, weak, slender, ascending or spreading, pilose; 

 sheaths pilose; ligule 3 mm long; blades thin, lax, ascending or spread- 

 ing, 4 to 7 cm long, 4 to 9 mm wide, sparsely pilose on the upper sur- 

 face, minutely appressed-pubescent beneath; panicle 3 to 6 cm long, 

 the axis and branches sparsely long-pilose; spikelets 2 mm long, pilose. 

 Autumnal culms decumbent, branching from all the nodes, forming a 



FIGURE 1371. Panicum languidum. Two 

 views of spikelet, and floret, X 10. 

 (Type.) 



FIGURE 1372. Panicum villosissimum. 

 Two views of spikelet, and floret, X 10. 

 (Type.) 



large loose straggling clump, the ultimate blades and panicles scarcely 

 reduced. 91 Dry or sandy open woods, Maine, Massachusetts, 

 Vermont, and eastern New York, apparently rare. 



57. Panicum villosissimum Nash. (Fig. 1372.) Vernal phase light 

 olive green; culms 25 to 45 cm tall, erect or ascending, pilose with 

 spreading hairs 3 mm long; sheaths pilose; ligule 4 to 5 mm long; 

 blades rather firm, 6 to 10 cm long, 5 to 10 mm wide, pilose on both 

 surfaces; panicle 4 to 8 cm long, the branches stiffly ascending or 

 spreading; spikelets 2.2 to 2.3 mm long, pilose. Autumnal culms 

 finally prostrate, the leaves of the fascicled branches appressed, giving 

 the cluster or mat a combed-out appearance. 91 Dry sandy or 



FIGURE 1373 Distribution of 

 Panicum villosissimum. 



FIGURE 1374. Panicum pseudopubescens- 

 Two views of spikelet, and floret, X 10. 

 (Type.) 



sterile soil, open woods, and hillsides, Massachusetts to Minnesota, 

 south to Florida and Texas; Guatemala (fig. 1373). 



58. Panicum pseudopubescens Nash. (Fig. 1374.) Vernal phase 

 similar to that of P. villosissimum; ligule 2 to 3 mm long; blades with 

 the pubescence on the upper surface short, sparse or wanting down the 

 center, occasionally glabrous; spikelets 2.2 to 2.4 mm long, pilose. 

 Autumnal culms stiffly spreading, sometimes prostrate, sparingly 

 branching from the middle and lower nodes. 91 Sandy open 

 woods, Connecticut to Wisconsin, south to Florida, Kansas, and Mis- 

 sissippi; Mexico (fig. 1375). 



