POACEAE 95 
45. Panicum pyriforme Nash. Stems densely tufted, 3-4 dm. tall, rather slender, 
glabrous, rather weak, finally much branched: leaves usually 2, or sometimes 3; sheaths 
densely papillose-hirsute with long reflexed hairs ; blades thin, lax, glabrous on both sur- 
faces, long-acuminate, narrowed to the barely rounded base, the primary ones 1-2 dm. 
long, 8-12 mm. wide: panicle ample, loose and open, 6-11 em. long, its branches widely 
spreading : spikelets rather few, about 2.5 mm. long and 1.5 mm. wide, broadly obovoid, 
densely pubescent with long hairs. 
In elay or sandy soil, peninsular Florida. Spring and summer. 
46. Panicum laxiflorum Lam. Stems tufted, erect, simple, 2-4 dm. tall, pubescent 
or glabrous: leaf-sheaths hirsute with reflexed hairs; blades 6-13 cm. long, 4-10 mm. 
wide, erect, glabrous or pubescent, ciliate on the margin: panicle 5-10 cm. long, its axis 
and erect or spreading branches sometimes hirsute : spikelets about 2 mm. long, elliptic or 
narrowly obovoid, strongly pubescent. 
In moist or dry soil, Virginia to Kentueky and Florida. Summer. 
47. Panicum neuránthum Griseb. A tufted usually glabrous perennial, or some- 
times the sheaths and lower part of the stem ascending-hirsute. Stems erect, 3-6 dm. tall, 
finally dichotomously Malis iere : primary leaves 4-6 ; sheaths usually much shorter 
than the internodes ; blades erect, firm, thickish, the primary ones 3-10 cm. long, 2-5 mm. 
wide, long-acuminate, those on the branches much smaller and usually involute: primary 
panicle much exserted, narrow, 5-8 cm. long, its branches erect or nearly so, sometimes 
spreading in age: spikelets 1.75-2 mm. long and about 1 mm. wide, turgid, broadly obo- 
void, pubescent with short spreading hairs. [P. ovinum Scribn. & Smith. ] 
In dry or moist sandy soil, Virginia to Florida, Texas and the Indian Territory. Also in Cuba. 
Spring to fall. 
48. Panicum angustifólium Ell Stems tufted, 3-6 dm. tall, finally profusely 
branched, glabrous, or sometimes pubescent toward the base: primary leaves usually 4 or 
5 ; sheaths glabrous, or the lower ones sometimes pubescent ; blades erect, linear-lanceolate, 
acuminate, glabrous, or the lower ones sometimes pubescent below, ciliate on the margin 
near the base, 5-12 cm. long, 3-6 mm. wide, those on the branches much smaller, crowded, 
usually involute : primary panicle broadly ovate, long-exserted, 6-9 cm. long, its branches 
spreading, glabrous, the secondary panicles much smaller, simple or nearly so: spikelets 
obovoid, 2.5-3.5 mm. long and 1.3-1.6 mm. broad, strongly nerved, densely pubescent with 
spreading hairs. [P. arenicoloides Ashe. P. orthophyllum Ashe. ] 
In dry sandy soil, Maryland to Florida and Texas. Spring to fall. 
49. Panicum consanguineum Kunth. A densely villous tufted perennial. Stems 
3-7 dm. tall, finally much branched, the nodes barbed with spreading hairs : primary leaves 
usually about 5; sheaths shorter than the internodes ; blades erect, linear-lanceolate, the 
primary ones 4-8 cm. long, 3-10 mm. wide, those on the branches much smaller: primary 
panicle 4-8 cm. long, oval, its branches ascending : spikelets 2.5 mm. long and about 1.3 
mm. wide, broadly obovoid, densely pubescent with spreading hairs. 
In dry sandy soil, North Carolina to Florida and Texas. Spring and summer. 
50. Panicum arenicola Ashe. Stems tufted, erect, usually from an ascending base, 
2-4 dm. tall, finally branched, pubescent below with long ascending or nearly erect hairs, 
minutely pubescent above: leaves 4 or 5, confined to the lower two-thirds of the stem ; 
sheaths, at least the lower ones, hispid with ascending hairs ; blades erect, firm, stiff, in- 
clined to become involute in drying, acuminate from below the middle, the lower ones 
sparingly hispid beneath, 2-6 cm. long, 2-6 mm. wide: panicle.long-exserted, broadly 
ovate, 2-5 em. long, its branches widely spreading : spikelets a little less than 2 mm. long 
and about 1.2 mm. wide, broadly obovoid, pubescent with very short spreading hairs. 
In dry soil, North Carolina to Mississippi, Summer. 
51. Panicum Roanokénse Ashe. Glabrous. Stems tufted, erect, 3-5 dm. tall, 
finally branched : leaves 3 or 4; blades erect, rather firm, 3-8 cm. long, 3-5 mm. wide: 
panicle 5-7 em. long, its branches ascending : spikelets glabrous, 2 mm. long and 1 mm. 
wide, elliptic. 3 
In dry soil, North Carolina. Summer. 
52. Panicum Nashiànum Scribn. Stems tufted, glabrous or puberulent, slender, 
1.5-4 dm. tall, finally much branched : leaf-blades erect or ascending, lanceolate, acumi- 
nate, glabrous or puberulent beneath, ciliate, at least at the base, 2-5 cm. long, 2-5 mm. 
wide, the blades on the branches smaller: primary panicle 2.5-5 cm. long, its branches 
widely spreading : spikelets about 2 mm. long, obovoid, glabrous to densely pubescent with 
short spreading hairs. [P. pauciciliatum Ashe. ] ‘ 
In pine lands, Virginia to Florida and Mississippi. Spring and summer. 
53. Panicum patentifdlium Nash. A nearly glabrous purplish tufted perennial. 
Stems erect or nearly so, 2-4 dm. tall, puberulent,4lender, finally much branched : leaves 2-4, 
