96 POACEAE 
rather distant ; sheaths minutely pubescent, especially at the apex on the margins ; blades 
widely spreading, firm, lanceolate, 2.5-4 cm. long, 2-4 mm. wide, puberulent at the very 
base on the upper surface: panicle 4-6 cm. long, broadly ovoid, its axis and spreading 
branches puberulent: spikelets about 2.5 mm. long and 1.3 mm. wide, pubescent with 
spreading hairs, the first scale J as long as the spikelet. 
In dry sandy soil, peninsular Florida. Spring. 
54. Panicum Webberianum Nash. Stems tufted, 2-4 dm. tall, erect or ascending, 
rigid, branched : leaf-sheaths ciliate on the margin ; blades lanceolate, 4-9 em. long, 7-14 
mm. wide, sparsely ciliate at the base, usually erect: panicle ovate, 6-9 cm. long, its 
branches spreading: spikelets elliptic or obovoid, 2.5 mm. long and about 1.3 mm. wide, 
the apex of the fourth scale minutely pubescent. [P. Onslowense Ashe. ] 
In pine lands, North Carolina to Florida. Spring and summer. 
55. Panicum dichótomum L. Light green, glabrous, or the lower nodes sometimes 
barbed. Stems tufted, slender, 2-6 dm. tall, rarely taller, finally much branched about 
the middle: primary leaves 4 or 5; sheaths shorter than the internodes ; blades widely 
spreading, linear-lanceolate, the primary ones 4-8 cm. long, usually 4-8 mm. wide, rarely 
wider, those on the branches much smaller, often involute: panicle 4-8 em. long, broadly 
ovate, its branches usually ascending: spikelets rather few, 1.75-2 mm. long and 0.8-1 
mm. wide, elliptic, glabrous. 
In dry soil, Connecticut and southern New York to Ohio, Georgia and Texas. Summer. 
56. Panicum Yadkinénse Ashe. A glabrous perennial. Stems single, 8-10 dm. 
tall, finally somewhat branched: leaves 5 or 6; sheaths much shorter than the inter- 
nodes, white-spotted ; blades ascending, lanceolate, acuminate, narrowed toward the base, 
the primary ones 8-12 cm. long, 8-12 mm. wide: panicle 8-12 cm. long, broadly ovate or 
oval, its branches long, ascending : spikelets about 2.3 mm. long and 1 mm. wide, elliptic, 
acute, glabrous. 
In dry or sandy soil, Maryland to Georgia. Summer. 
57. Panicum barbulàtum Michx. Glabrous. Stems densely tufted, at first erect, 
finally much branched and decumbent, the nodes strongly barbed with silky somewhat re- 
flexed hairs: primary leaves 5-7 ; sheaths shorter than the internodes, ciliate on the over- 
lapping margin ; primary leaf-blades spreading, sometimes somewhat reflexed, usually 6-10 
em. long, rarely shorter or longer, 8-15 mm. wide, lanceolate, the blades on the branches 
much smaller: panicle finally much exserted, 7-11 cm. long, oval, its branches ascending : 
spikelets 1.5-1.8 mm. long and about 0.8 mm. broad, elliptic, glabrous, or rarely minutely 
and sparingly pubescent. [P. nitidum var. barbulatum (Michx. ) Wood. ] 
In wet places, New York to Illinois, Florida and Mississippi. Summer. 
58. Panicum nemopánthum Ashe. A tufted nearly glabrous perennial with barbed 
nodes. Stems 3-5 dm. tall, erect: leaves 3 or 4; lowermost sheaths sometimes pubescent, 
the uppermost often longer than the internodes ; blades spreading or ascending, lanceolate, 
long-ciliate toward the somewhat narrowed base, 7-10 cm. long, 5-6 mm. wide, long- 
acuminate: panicle 7-10 cm. long, broader than long, its branches wide-spreading, lax and 
drooping: spikelets about 2.5 mm. long, a little exceeding 1 mm. broad, elliptic, glabrous. 
In woods, North Carolina. Spring. 
59. Panicum Mattamuskeeténse Ashe. A tall sometimes tufted perennial with 
barbed nodes. Stems 6-12 dm. tall, finally much branched : leaves 6 or 7 ; sheaths much 
shorter than the internodes, usually considerably less than 3 as long, ciliate on the margins, 
all but the lower ones glabrous ; blades spreading, 3-8 cm. long, 3-10 mm. wide, the lower- 
most pubescent on both surfaces: panicle 6-10 dm. long, ovate : spikelets 2-2.5 mm. long 
and about 1 mm. wide, elliptic, pubescent with short spreading hairs. 
In wet places, North Carolina. Summer. 
60. Panicum ánnulum Ashe. Stems 4—7 dm. tall, glabrous or sparingly pubescent, 
finally branched, the nodes densely barbed with spreading hairs: leaves 4 or 5; sheaths 
softly pubescent or sometimes the upper ones glabrous; blades erect or nearly so, softly 
pubescent on both surfaces, or the upper ones sometimes glabrous: panicle 4-10 cm. long, 
its branches erect-ascending or ascending, rarely spreading: spikelets usually numerous,. 
1.8-2 mm. long and about 0.8 mm. wide, elliptic, strongly pubescent with spreading hairs. 
In dry rocky woods, Maryland to Georgia and Mississippi. Spring and summer. 
61. Panicum Eárlei Nash. Stems densely tufted, slender, 1-1.5 dm. tall, usually 
with a few long weak scattered hairs below, finally branched, the nodes rather sparingly 
barbed : leaves about 3; sheaths rather sparsely hirsute with long hairs ; blades ascending, 
lanceolate, rather sparingly hirsute on both surfaces with long spreading hairs, 1-3 cm. 
long, 2-6 mm. wide: panicle 2-3 em. long, broadly ovate, its smooth branches spreading : 
spikelets about 1.3 mm. long, 0.7 mm. wide, elliptic, glabrous. [P. austromontanum Ashe. ] 
In sandy soil, Tennessee and Alabama. Spring and summer. 
