86 FLORA. 



mm. long, obovate, the second and third scales 7-nerved, densely pubescent with 

 short, spreading hairs. Pine lands, Va. to Fla. March-July. 



31. Panicum Columbianum Scribn. (I. F. f. <6jb.) Culms tufted, erect, 

 softly pubescent, 2-6 dm. tall, at length dichotomously branched, the branches 

 erect. Lower sheaths pubescent, the upper glabrous; leaves lanceolate, erect, 

 thickish and firm, glabrous above, the lower ones more or less pubescent beneath, 

 the primary 3.75-5 cm. long, 4-6 mm. wide, those on the branches smaller; pan- 

 icle small, ovate, 2.5-3.75 cm. long, its branches ascending; spikelets broadly 

 obovoid, a little more than 1.5 mm. long, the outer 3 scales densely pubescent with 

 spreading hairs. Fields and open woods, Mass, to N. Car., west to Tenn. and 

 Ala. June-Sept. 



32. Panicum tsugetorum Nash. HEMLOCK PANICUM. (I. F. f. z6-jd.) 

 Culms and sheaths pubescent with short appressed or ascending hairs intermixed to- 

 ward the base with longer ones. Culms tufted, 4.5 dm. or less tall, at length much 

 branched and decumbent or prostrate; leaves erect or ascending, firm, lanceolate, 

 minutely appressed-pubescent beneath, smooth and glabrous above, the primary 

 leaves 3.75-7.5 cm. long, 5-8 mm. wide, those on the branches smaller; primary 

 panicles broadly ovoid, 3.75-6.25 cm. long, the branches spreading-ascending; 

 spikelets broadly obovoid, about 1.75 mm. long, the outer 3 scales pubescent, with 

 short spreading hairs. Dry soil in hemlock woods, Conn, and N. Y. to Ohio. 



33. Panicum implicatum Scribn. HAIRY-PANICLED PANICUM. (I. F.f. 267a.) 

 Culms tufted, erect, 2.5-4.5 dm. tall, very slender, more or less pubescent, 

 at length much branched. Sheaths densely papillose-hirsute, at least the 

 lower ones; leaves erect, lanceolate, 1.25-5 cm - l n g> 2 ~6 mm. wide, at least 

 the lower ones papillose-hirsute on both surfaces, especially beneath; panicle open, 

 ovate, 2.5-6.25 cm. long, its branches widely spreading; spikelets broadly obovoid, 

 obtuse, purplish, about 1.5 mm. long, the outer 3 scales pubescent with short, 

 spreading hairs, the first scale nearly one-half as long as the spikelet, broadly ovate, 

 obtuse. Dry soil, Me. to Conn., N. Y. and N. J. 



34. Panicum filiculme Ashe. Culms densely tufted, slender, finally much 

 branched, 2-3 dm. tall, minutely pubescent above. Sheaths hirsute with strongly 

 very long hairs; leaves erect, the primary ones 1.5-3 cm. long, 2-4 mm. wide, 

 papillose-pubescent on both surfaces or sometimes glabrous beneath, the hairs on 

 the upper surface exceedingly long and copious; primary panicle long-exserted, 

 2-3 cm. long; spikelets broadly obovoid, 1.5 mm. long, pubescent. In dry soil, 

 N. J. to Ga. June-Aug. 



35. Panicum pubescens Lam. HAIRY PANICUM. (I. F. 267.) Culms at 

 first erect and simple, later profusely branched and leaning or ascending, glabrous 

 or pubescent. Sheaths hirsute, often papillose; leaves more or less hirsute, espe- 

 cially beneath, generally more or less spreading, those of the culm 5-7.5 cm. long, 

 those of the branches much shorter; primary panicles less than 7. 5 cm. long, ovoid, 

 their branches ascending; lateral panicles much smaller; spikelets hardly 2 mm. 

 long, pubescent. In dry soil, common. Me. and Quebec to Br. Col., south to Ga., 

 Ind. Terr, and Aria. June-Aug. 



36. Panicum Atlanticum Nash. ATLANTIC PANICUM. (I. F. f. 267 f.) 

 Papillose-hirsute with long, white, spreading hairs. Culms tufted, at length 

 branched. 3-5 dm. tall, erect 'or ascending, a smooth ring below the nodes which 

 are barbed with spreading hairs; leaves erect, rigid, thickish, linear-lanceolate, 

 3.75-10 cm. long, 4-7 mm. wide, middle leaves the longest; panicle 3.75-6.25 

 cm. long, 3-6 cm. wide; spikelets numerous, obovoid, a little over 2 mm. long, 

 1.5 mm. wide, obtuse, the outer 3 scales densely pubescent with short spreading 

 hairs. Dry soil, N. Y. to Ohio and Va. June-Aug. 



37. Panicum lunuginosum Ell. WOOLLY PANICUM. (I. F. f. i66a.) Culms, 

 sheaths and leaves villous with spreading hairs, those on the leaves and the upper part 

 of the culm shorter. Culms leafy, tufted, 3-7.5 dm. tall, erect, at length branched, 

 a smooth ring below each barbed node; leaves erect, lanceolate, 3.75-12.5 cm. 

 long, 4-9 mm. broad; panicle ovoid, 3.75-10 cm. long, the axis pubescent, the 

 branches ascending, the larger 2.5-5 cm - l n gj spikelets numerous, broadly obo- 

 void, about 1.75 mm. long, the first scale orbicular, the second and third scales 

 nearly orbicular, densely pubescent with spreading hairs. Dry sandy soil, south- 

 ern N. J. to Fla. and Ala. 



