84 FLORA. 



wide, tin- uppermost leaf the Longest, and often extending beyond the panicle; pri- 

 mary panicle loose and open, 3.75-10 cm. long, its branches ascending; spikelets 

 2 2.5 nun. long, obtuse 0T acutish, pubescent with spreading hairs. Dry soil, es- 

 pecially hillsides, N. Y. and N. J. to Mo. {P. Knslini Nash, not Trin.) 



17. Panicum Werneri Scrihn. Wkknkr's Panicum. (I. F. f. 268b.) Smooth 

 and glabrous, light green. Culms tufted, erect, slender, simple or later sparingly 

 branched, 2.5-4.5 dm. tall; leaves erect, elongated, linear, acuminate, 5-10 cm, 

 long, 3-5 mm. wide, panicle loose and open, 6.2-8.7 cm - l° n g> its branches as- 

 cending; spikelets al>out 2 mm. long on longer hispidulous pedicels, oval, minutely 

 and sparsely pubescent, the first scale orbicular, alxnit one-quarter as long 

 as the spikelet, I -nerved, the second and third scales 7-nerved, the fourth scale 

 oval, slightly apiculate. Dry knolls in swamps, N. Y, and Ohio. June-July. 



18. Panicum Bicknellii Nash. Bicknell's Panicum. (I. F. f. 268c.) 

 Culms erect or decumbent at the base, slender, 2-4 dm. tall, the lower internodes 

 puberulent. Sheaths ciliate on the margins, the lowermost pubescent; leaves 

 elongated, erect, linear-lanceolate, acuminate, narrowed toward the ciliate base, 

 primary leaves 7. 5— 17.5 cm. long, 5-10 mm. wide; primary panicle 6-7.5 cm - l° n g> 

 its branches ascending, secondary panicles smaller, with appressed branches; spike- 

 lets obovate or oval, 2.5-3 mm. long, pubescent with short, spreading hairs, the first 

 scale 1 -nerved, the second and third scales 9-nerved. Dry wooded hills, N. Y, 

 and Penn. July-Aug. 



19. Panicum laxiflorum Lam. Lax-flowered Panicum. (I. F. f. 262.) 

 Culms erect, 2-4 dm. tall, simple, pubescent, or glabrate. Sheaths shorter than 

 the internodes, hirsute; leaves 6.25-12.5 cm. long, 4-10 mm. wide, erect, generally 

 narrowed at base, long-acuminate, pubescent or glabrate; panicle 5-10 cm. long, 

 its axis and erect or spreading branches sometimes hirsute; spikelets about 2 mm. 

 long, ellipsoid or narrowly obovoid, strongly pubescent; first scale minute, 

 1 -nerved; second and third about equal, 9-nerved, very pubescent, as long as the 

 shining, obtuse, minutely apiculate fourth one; third scale usually with an empty 

 palet. Moist soil, Va. to Ky., south to Fla. June-Aug. 



20. Panicum neuranthum Griseb. Nerved Panicum. (I. F. f. 269a.) 

 Culms tufted, slender, at length much branched, 3-7.5 dm. tall. Sheaths gla- 

 brous, or the lower pubescent; leaves smooth and glabrous, the primary erect, 

 acuminate, 2.5-10 cm. long, 2-5 mm. wide, those on the branches shorter, erect or 

 ascending, usually involute when dry, concealing the small secondary panicles; 

 primary panicle 2.5-10 cm. long, its branches at first erect, at length widely 

 spreading; spikelets numerous, broadly obovate, about 2 mm. long, densely pubes- 

 cent with short, spreading hairs, the second and third scales 7-nerved. Dry or 

 moist soil along the coast, Va. to Fla. and La. Also in Cuba. June-Oct. 



21. Panicum angustifolium Ell. Narrow-leaved Panicum. (I. F. f. 269.) 

 Culms erect, 3-6 dm. tall, glabrous, at first simple, later profusely branched 

 above. Leaves elongated, 2-6 mm. wide, narrowed to the base, firm, glabrous, 

 those of the culm distant, those of the branches shorter and crowded; primary 

 panicle long-exserted, 2.5-7.5 cm. long, its branches ascending or erect; lateral 

 panicles smaller, shorter than the leaves; spikelets few, about 2.5 mm. long, 

 elliptic to obovoid; first scale one-fourth to one-third as long as the spikelet; 

 second and third oval, 9-nerved, pubescent; fourth oval, minutely pubescent at 

 the apex. Dry soil, N. Car. to Mo., south to Fla. and Tex. June-Aug. 



22. Panicum Brittoni Nash. Britton's Panicum. (I. F. f. 263a.) Smooth 

 and glabrous. Culms coarsely striate, not branched, tufted, slender, erect, rigid, 

 1-2 dm. tall; leaves longer than the sheaths, those on the culm three in number, 

 the middle one the longest, I.25-3. 1 cm. long. 1.5-3111111. wide, erect, acuminate, 

 5-7-nerved; panicle 1.8 3.1 cm. long, its branches spreading or ascending; spike- 

 let- one-half as long as the pedicels or less, obovoid. obtuse, 1. 5 mm. long, the first 

 scale one-third as long as the spikelet, the second and third scales 7-nerved, densely 

 pubescent with spreading hairs. Moist sand in the pine barrens of southern N. J. 

 May-June. 



23. Panicum dichotomum L. FORKED PANICUM. (I. F. f. 264.) Smooth 

 and glabrous, or the lower node- barbed. Culms erect, 1.5-6 dm. tall, at first 

 simple, later profusely dichotomously branched at about the middle. Leaves light 

 green, widely spreading, generally much narrowed toward the base, the primary 



