280 NORTH AMERICAN FLORA [Volume 17 



flexuous, fascicled branches ascending or spreading, naked at the base, scabrous, sometimes 

 with a few viscid spots; spikelets 3 mm. long, elliptic, minutely pubescent; first glume one fourth 

 to one third as long as the spikelet, acute ; second glume and sterile lemma abruptly acute, 

 slightly exceeding the fruit; fruit elliptic, 2.7 mm. long, 1.3 mm. wide, minutely umbonate. 



Autumnal phase branching from the middle nodes, the branches more or less divaricate, 

 not much crowded, the blades not greatly reduced, the ultimate panicles wholly or partially 

 included in the sheaths. 



Type locality: Takoma Park, District of Columbia. 



Distribution: Long Island, New York, to North Carolina. 



Illustrations: Contr. U. S. Nat. Herb. IS: /. 336; Britt. & Brown, 111. Fl. ed. 2./. 380. 



191. Panicum scabriusculum Ell. Bot. S. C. & Ga. 1: 121. 1816. 



Panicum lanuginosum Bosc; Spreng. Syst. 1: 319. 1825. Not P. lanuginosum Ell. 1816. 

 Panicum eriophorum Schultes; Kunth, Enum. 1: 128. 1833. 

 Panicum Nealleyi Vasey, Bull. Torrey Club 13: 25. 1886. 



Panicum dichotomum datum Vasey, Bull. U. S. Dep. Agr. Bot. 8:31. 1889. 



Vernal phase grayish- olive; culms erect, 1-1.5 meters high, scabrous at least below the 

 nodes, sometimes puberulent, the nodes glabrous or puberulent; leaf -sheaths shorter than the 

 internodes, glabrous to more or less hispid at least toward the summit, often mottled or white- 

 spotted, commonly swollen at the base and contracted toward the summit; ligule short-mem- 

 branaceous, usually with a ring of hairs above; blades stiffly ascending or spreading, often 

 reflexed, 15-25 cm. long, 9-12 or rarely 15 mm. wide, glabrous or scabrous, often more or less 

 pubescent beneath, gradually tapering to an involute point, slightly narrowed toward the base; 

 panicles finally exserted, 10-20 cm. long, half to two thirds as wide, rarely wider, many-flowered, 

 the axis glabrous or pubescent, often viscid, the flexuous branches ascending, spikelet-bearing 

 from near the base; spikelets 2.3-2.6 mm. long, 1.1-1.3 mm. wide, ovate, pointed, glabrous or 

 obscurely puberulent; first glume less than one sixth as long as the spikelet; second glume and 

 sterile lemma strongly nerved, exceeding the fruit and forming an abrupt point beyond it ; fruit 

 1.8 mm. long, 1 mm. wide, elliptic. 



Autumnal phase erect, branching from the middle and upper nodes, the branches appressed, 

 somewhat longer than the internodes, finally bearing fascicled branchlets and forming dense 

 oblong masses along the upper part of the primary culm, the sheaths, especially the later ones, 

 densely papillose-hirsute, the flat, reduced blades ovate-lanceolate, reduced in length much 

 more than in width, the panicles partly or entirely inclosed in the sheaths. 



Type locality: Savannah, Georgia. 



Distribution: New Jersey to Florida and eastern Texas. 



Illustrations: Bull. U. S. Dep. Agr. Agrost. 17: /. 387; Contr. U. S. Nat. Herb. 15: /. 338; 

 Britt. & Brown, III. El. ed. 2./.37P. 



192. Panicum cryptanthum Ashe, Bull. N. Car. Exp. Sta. 



175: 115. 1900. 



Vernal phase cespitose; culms erect, 80-100 cm. high, glabrous except the usually bearded 

 nodes; leaf -sheaths glabrous or the lowermost sparsely hirsute, the upper somewhat inflated, 

 all more or less ciliate on the margins and pilose at the summit; Jigule membranaceous, erose, 

 scarcely 0.5 mm. long; blades stiff, ascending or spreading, acuminate, involute-pointed, 

 glabrous, sparingly ciliate at base, 10-15 cm. long, 7-9 mm. wide; panicles short-exserted, 

 6-10 cm. long, nearly as wide, the axis and ascending branches viscid-spotted; spikelets 2.2-2.4 

 mm. long, 1 mm. wide, lanceolate-elliptic, pointed; first glume one fourth to one third as long 

 as the spikelet ; second glume and sterile lemma equal, longer than the fruit and pointed beyond 

 it, glabrous or sparsely pilose; fruit 1.5 mm. long, 0.9 mm. wide, elliptic. 



Autumnal phase erect, glabrate on the nodes, sparingly branching from the middle and 

 upper nodes, the branches stiffly ascending at an angle of 30-45 degrees; blades flat, stiffly 

 ascending, 2-5 cm. long, 3-5 mm. wide, involute-pointed; panicles reduced to a narrow cluster 

 partially hidden in the sheaths. 



Type locality: Wilson's Mill, North Carolina. 

 Distribution: North Carolina to Florida; eastern Texas. 

 Illustration: Contr. U. S. Nat. Herb. 15: /. 340. 



