POACEAE 101 



93. Panicuni Atlanticutn Nash. Densely papillose-hirsute, the hairs on the sheaths 

 and upper surface of tlie leaf-blades exceedingly long. Stems tufted, erect, often from an 

 ascending base, 3-5 dm. tall, tinally branched, the nodes barbed with spreading hairs : 

 sheaths shorter than the internodes ; blades erect, lanceolate, rather firm, the |)rimary ones 

 usually ()-8 cm. long, rarely longer or shorter, 4-8 mm. wide : panicle 5-7 cm. long, 

 broadly ovoid, its branches ascending : spikelets barely exceeding 2 mm. long and about 1.2 

 mm. wide, broadly obovoid, pubescent with spreading hairs. 



In dry soil, southeastern New York to Georgia and Mississippi. Summer. 



96. Panicum villosissimum Nash. Whole plant densely pubescent with long 

 spreading hair.s. Stems 3-6 dm. tall, erect or ascending, the nodes barbed : leaf-blades 

 linear-lanceolate, 5-10 cm. long, 4-9 mm. wide, erect, yellowish green : panicle long- 

 exserted, broadly ovate, 6-10 cm. long, its branches spreading or ascending, sometimes 

 flexuous, the lower ones 3-6 cm. long: spikelets elliptic, 2.5 nun. long and about 1.25 

 mm. wide, obtuse or acutish, pubescent. 



In alluvial soil, Georgia. Spring and summer. 



97. Panicum xanthospermum Scribn. & Mohr. Stems tufted, 1-2 dm. tall, hirsute, 

 tinally branclied : leaf-sheaths hirsute; blades 3-6 cm. long, 5 8 mm. wide, lanceolate, 

 pubescent on both surfaces with long rather stiff spreading hairs, those on the upper surface 

 the longer : panicle 3-4 cm. long, its branches ascending: spikelets yellowish, about 2.3 

 ram. long and 1 mm. wide, elliptic, pubescent with long weak hairs. 



lu dry sandy soil, Alabama. Spring and fall. 



98. Panicum Commonsianum Ashe. Stems tufted, 3-5 dm. tall, finally branched, 

 pubescent below with long nearly appressed hairs, the upper portion glabrous or 

 puberulent, the nodes bearded with spreading hairs : primary leaves usually 2 or 3 ; sheaths, 

 at least the lower ones, pubescent with nearly appressed hairs ; blades erect, lanceolate, 

 strigose on the lower surface, the upper surface glabrous or with some long spreading hairs 

 toward the base, the primary ones 4-8 cm. long, 3-6 mm. wide : panicle 4-8 cm. long, 

 ovate, its branches spreading or ascending : spikelets 2.5 mm. long and about 1.3 mm. 

 wide, obovoid, pubescent with spreading hairs, the lirst scale about 2 as long as the spikelet. 



In dry sandy soil near the coast, New .Jersey and Delaware. Spring and summer. 



99. Panicum strictifolium Nash. Stems tufted, 2.5-5 dm. tall, strongly pubescent 

 toward the base with long soft hairs, puberulent toward the summit, finally much branched : 

 leaves 3 or 4 ; sheaths nuich shorter than the internodes, the lower ones densely pubescent 

 with long soft appressed hairs; blades erect or nearly so, rather firm, narrowly lanceolate, 

 the upper surface often with a few long scattered hairs, the primary blades 4-7 cm. long, 

 3-5 mm. wide : panicle 5-7 cm. long, broadly ovoid, its axis and spreading branches mi- 

 nutely pubescent: spikelets obovoid, 3 mm. long and about 1.5 mm. wide, densely pubes- 

 cent with rather long spreading hairs. 



In dry sandy soil, peninsular Florida. Spring and summer. 



100. Panicum ciliiferum Nash. Stems tufted, 2-5 dm. tall, finally much branched, 

 densely hirsute below with long nearly erect hairs, spai-sely pubescent above : primary 

 leaves usually 3, sometimes 2 ; sheaths densely hirsute with long ascending hairs ; blades 

 erect or ascending, lanceolate, the upper surface glabrous or sometimes with some long 

 erect hairs near the base, the lower surface strongly strigose, ciliate with long hairs, the 

 primary ones 3-8 cm. long, 4-10 mm. wide : primary panicle ample, 6-11 cm. long, 

 broadly oval, its branches spreading or ascending : spikelets about 2.75 mm. long and 1-1.2 

 mm. wide, elliptic, pubescent with long spreading hairs. 



In dry sandy soil, peninsular Florida. Spring and summer. 



101. Panicum epilifolium Nash. A glabrous tufted perennial. Stems 2-3.5 dm. 

 tall : leaves 2 or 3 ; sheaths minutely pubescent at the apex, ciliate on both margins with 

 long slender hairs ; blades widely spreading, linear-lanceolate, 4-7 cm. long, 5-7 mm. 

 wide, minutely pubescent on the upper surface between the nerves : panicle 5-7 cm. long, 

 ovate, its branches spreading or ascending : spikelets 3 mm. long and about 1.5 mm. wide, 

 oval, obtusely apiculate, densely pubescent with short spreading hairs, the first scale about 

 h as long as the spikelet. 



In dry sandy soil, peninsular Florida. Spring. 



102. Panicum pedicellatum Va.sey. A pubescent perennial. Stems 3-4 dm. tall, 

 pubescent witii short ascending hairs, finally branched : leaves 4 or 5 ; sheaths shorter 

 than the internodes, pubescent between the nerves with short hairs, ciliate on the margins 

 with long hairs ; blades erect or nearly so, linear-lanceolate, pubescent on both surfaces 

 with rather short .spreading hairs, usually ciliate at or toward the base, the primary ones 

 4-9 cm. long, 2.5-4 nun. wide, those on the branches smaller : panicle 3-4 cm. long, nar- 

 row, its branches erect-ascending : si)ikelets 4 mm. long and 1.5 mm. wide, the .scales 



