122 GRAMINEAE. 
27. Panicum angustifolium Ell. Narrow-leaved Panicum. (Fig. 269.) 
Panicum angustifolium EN, Bot. S. C. & Ga. 1: 129. 1817. 
Panicum consanguineum §, Wats. in A. Gray, Man. Ed. 
6, 633, in part. 1890, Not Kunth, 1835. 
Culms erect, 1°-2° tall, glabrous, at first simple, 
later profusely branched above. Sheaths glabrous or 
the basal ones pubescent, those on the culm shorter 
than the internodes, those on the branches crowded ; 
leaves elongated, 1’’-3’’ wide, narrowed to the base, 
firm, glabrous, those of the culm distant, those of the 
branches shorter and crowded ; primary panicle long- 
exserted, 1/—3’ long, its branches ascending or erect ; 
lateral panicles smaller, shorter than the leaves; 
spikelets few, about 144’’ long, elliptic to obovoid; 
first scale one-fourth to one-third as long as the spike- 
let; second and third oval, 9-nerved, pubescent; fourth 
oval, minutely pubescent at the apex. 
Dry soil, North Carolina to Missouri, south to Florida 
and Texas. June-Aug. 
28. Panicum virgatum I. ‘Tall Smooth Panicum. (Fig. 270. ) 
Panicum virgatum J, Sp. Pl. 59. 1753. \ vege 
Culms erect from a creeping rootstock, 3°-5° tall, 
glabrous. Sheaths smooth and glabrous; leaves elon- 
gated, 1° or more long, 3/’-6’’ wide, flat, long-acumin- 
ate, narrowed toward the base, glabrous, rough on 
the margins; panicle 6’-20’ long, the lower branches 
4’-10/ long, more or less widely spreading or sometimes 
nearly erect; spikelets ovate, acuminate, 2//-214// 
long; first scale acuminate, about one-half as long as 
the spikelet, 3-5-nerved; second scale generally 
longer than the others, 5-7-nerved, the third similar 
and usually subtending a palet and staminate flower ; 
fourth scale shining, shorter than the others. 
In moist or dry soil, Maine and Ontario to Minnesota, 
south to Florida, Kansas and Texas. Aug.—Sept. 
29. Panicum amarum EJ]. Sea-beach Panicum. (Fig. 271.) 
Panicum amarum Ell, Bot. §. C. & Ga. 1: 121. 1817. 
Smooth and glabrous, glaucous, culms arising from 
long branching rootstocks, 1°-3° tall, decumbent. 
Sheaths overlapping; leaves 6’-1° long, 3//-6’’ wide, 
long-acuminate, thick and leathery, involute on the 
margins, at least toward the apex, the uppermost leaf 
generally exceeding the panicle; panicle linear, less 
than 1° long, its branches erect; spikelets 214//-3’’ 
long; first, second and third scales acuminate, the first 
one-half to two-thirds as long as the spikelet, the third 
somewhat longer than the second, usually with a palet 
~ and staminate flower, the fourth elliptic, about 13/’/ long. 
On sea-beaches, Connecticut to Florida. Sept.—-Nov. 
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