1060 APPENDIX. 



27c. Panicum leucdthrix Nash. Gray-haired Panicum. A villous 

 densely tufted perennial. Culms 3-6 dm. tall; primary leaves 3-5; 

 blades erect, rather firm, lanceolate, densely and softly pubescent on 

 the lower surface with short spreading hairs, glabrous above, 3-5 cm. 

 long, 4-6 mm. wide; primary panicle usually 3-5 cm. long, broadly 

 ovoid, its branches ascending; spikelets about 1.2 mm. long and about 

 0.6 mm. wide, oval, pubescent. In usually dry sandy soil, southern 

 N. J. to Fla. and Tex. July and Aug. 



After Panicum boreale, insert: 



28a. Panicum Clutei Nash. Clute's Panicum. A tufted nearly 

 glabrous perennial. Culms rather stout, 6-8 dm. tall, at length branched; 

 leaves 4 or 5; sheaths rather loose, minutely pubescent at the apex; 

 blades firm, ascending, lanceolate, smooth on both surfaces, rough 

 on the margins, the lower and larger 7-14 cm. long, 7-12 mm. wide; 

 panicle considerably exserted, broadly ovoid, 6-10 cm. long; spikelets 

 oval, acutish, about 2.3 mm. long and 1.3 mm. wide, densely pubescent 

 with short hairs. In the pine-barrens of southern N. J. July. Differs 

 from P. boreale Nash by its stouter habit and larger spikelets. 



P. 86, No. 35, read " unciphyllum Trin." instead of " pubescens Lam.", 

 and as a synonym add " P. pubescens A. Gray, not Lam." 



After No. 35, insert: 



35a. Panicum Tennesseense Ashe. Tennessee Panic-grass. Culms 

 tufted, 4-6 dm. tall, rather weak and ascending, papillose-hirsute with 

 long spreading hairs; leaves ascending, lanceolate, the lower surface softly 

 and densely pubescent with short hairs, the upper surface with scattered 

 long hairs, the primary leaves 4-10 cm. long, 5-10 mm. wide,' those on the 

 branches much shorter and spreading and with the upper surface nearly 

 glabrous; panicle 7-10 cm. long, its branches ascending; spikelets 1.7-2 

 mm. long, 0.8-0.9 nun. wide, elliptic or obovoid, strongly pubescent with 

 long spreading hairs. In woods, N. Y. and 111. to Tenn. and Fla. July- 

 Sept. Differs from P. unciphyllum Trir. . in its lighter color, usually weak 

 culms, and the glabrous upper surface Df the leaves. 



P. 87, No. 38, read " scoparium Lam." instead of " viscidum Ell.", and 

 refer the latter to synonymy, to which add also "P. pubescens Lam." 



After No. 38, insert: 



38a. Panicum scabriusculum Ell. Roughish Panic-grass. Culms gla- 

 brous or pubescent, 8-14 dm. long, erect, finally branched; sheaths gla- 

 brous or pubescent; leaves erect or ascending, linear-lanceolate, glabrous, 

 1-2 dm. long, 8-12 mm. wide; panicle 1-2 dm. long, its branches spreading 

 or ascending; spikelets lanceolate, glabrous, 2-2.3 mm. long and 1 mm. 

 broad, ovate to ovate-lanceolate, acute, the nerves of the flowering scale 

 very prominent. In swampy places and ponds, Va. to Fla. and Tex. 

 May-Aug. Differs from P. scoparium Lam. in its longer and narrower 

 glabrous leaves and glabrous spikelets. 



P. 87, after Panicum Addisbnii, insert: 



39a. Panicum psammdphilum Nash. Sand Panicum. A tufted 

 perennial. Culms 2-4 dm. tall, appressed-hirsute below, finally much 

 branched; leaves of the main culm 3-5; sheaths appressed-pubescent; 

 blades erect or nearly so, thick, firm, serrulate on the margins, puberu- 

 lent beneath, occasionally with a few long scattered hairs on the upper 

 surface, the primary blades 2-5 cm. long and 2-5 mm. wide; primary 

 panicle usually 2-3 cm. long, at least its axis puberu'lent ; spikelets broadly 

 obovate, 1 3-1-5 nun. long, 0.8-1 mm. wide, obtuse, densely pubescent 

 with Spreading hairs. In sandy soil along the coast, Mass. to N. J. 

 June to Aug. Differs from P. Addjeonii Nash by its much smaller 

 spikelets. 



