82 FLORA. 



cles, when present, smaller; spikelets 2-2.5 mm - l n g> acuminate; first scale one- 

 fourth to one- half as long as the spikelet; second and third scales nearly equal, 

 very acute, the fourth 1.5 mm. long. In dry soil, common as a weed in cultivated 

 fields, N. S. to Br. Col., south to Fla., Tex. and Nev. July-Sept. 



Panicum capillare Gattingcri Nash. Culms more slender than in the type; terminal 

 panicle rarely over 1.5 dm. long, the lateral ones very numerous. Moist places, N. j. 

 to Tenn., Mo. and southward. 



4. Panicum Philadelphicum Bernh. WOOD PANICUM. (I. F. f. 277.) Culms 

 erect, or occasionally decumbent, 2-6 dm. long, slender, somewhat branched at 

 base. Sheaths hirsute; leaves 5-10 cm. long. 2-6 mm. wide, erect, more or less 

 pubescent; panicle 10-22.5 cm. long, its lower brandies 7.5-10 cm. long, spread- 

 ing or ascending; spike'ets about 1.5 mm. long, elliptic, acute, smooth, borne in 

 pairs at the extremities of the ultimate divisions of the panicle; first scale about 

 one-third as long as the equal acute second and third ones, the fourth somewhat 

 shorter than the third. In dry woods and thickets, N. B. to Ga., west to Mo. 

 Aug.-Sept. (/". minus (Muhl.) Nash, not P. pubescens minus Poir.) 



5. Panicum flexila (Gattinger) Scribn. WIRY PANICUM. (I. F. f. 275.) 

 Culms erect, 1.5-4.5 dm. tall, slender, bearded at the nodes. Sheaths papillose- 

 hirsute; leaves 10-22.5 cm< l n S> 4-6 mm. wide, erect, long-acuminate, more or 

 less pubescent; panicle 1-2.25 dm. l n g narrowly ovoid to oblong in outline, its 

 branches ascending, the lower ones 5-8.5 cm. long; spikelets 3 mm. long, much 

 shorter than the pedicels, acuminate; first scale about one-fourth as long as the 

 spikelet; second and third scales about equal, 5-7 -nerved; fourth scale elliptic, 

 somewhat shorter than the third. In moist or dry soil, Penn. to Tenn. and Mo. 

 Aug. -Oct. 



6. Panicum cognatum Schultes. DIFFUSE PANICUM. (I. F. f. 276.) Culms 

 erect or decumbent, 3-6 dm. tall, generally much branched at the base, slender. 

 Lower sheaths sometimes densely pubescent; leaves 3.75-10 cm. long, 2-6 mm. 

 wide, ascending, acuminate, glabrous; panicle 1.25-3 dm. long, bearded in the 

 axils, the lower branches 1-2 dm. long, finally exserted and widely spreading at 

 maturity; spikelets lanceolate, about 3 mm. long, acuminate, glabrous or pubes- 

 cent, on capillary pedicels of many times their length; first scale minute; second 

 and third equal, acute, glabrous or sometimes villous, the fourth lanceolate, 2.5 mm. 

 long. In dry soil, 111. to Ga. and PUa., west to Minn., Mo. and Ariz. July-Sept. 

 (P. aiitumnale Bosc.) 



7. Panicum miliaceum L. MILLET. (I. F. f. 272.) Culmse rect or decum- 

 bent, rather stout. 3 dm. tall or more, glabrous or hirsute. Sheaths papillose-hir- 

 sute; leaves 1.252.5 dm. long, 8-25 mm. wide, more or less pubescent; panicle 

 rather dense, 1-2.5 dm. l n g> branches erector ascending; spikelets 5 mm. long, 

 acuminate; first scale about two-thirds as long as the spikelet, acuminate, 5-7- 

 nerved; second scale acuminate, 13-nerved, somewhat exceeding the 7-13-nervcd 

 acuminate third one, which subtends an empty palet; fourth scale shorter than the 

 third, becoming indurated, obtuse. In waste places, Me. to Del. and Penn., west 

 to Neb. Adventive from the Old World. July-Sept. 



8. Panicum proliferum Lam. SPREADING PANICUM. (I. F. f. 273.) Culms 

 at first erect, 3-6 dm. tall, simple, later decumbent and geniculate, 1-1.5 m. long, 

 branched at all the upper nodes. Sheaths loose, glabrous, somewhat flattened ; leaves 

 1.5-6 dm. long, 420 mm. wide, long-acuminate, scabrous on the margins and 

 occasionally on the nerves; panicle pyramidal, 1-4 dm. long; spikelets 2-3 mm. 

 long, crowded, lanceolate, acute, glabrous, sometimes purplish; first scale about 

 one-fourth as long as the spikelet, enclosing its base; second and third scales about 

 equal, acute, 5~7-nerved; fourth scale elliptic, shining. In wet soil, Me. to Penn. 

 and Neb., south to Fla. and Tex. July-Sept. 



9. Panicum virgatum L. TALL SMOOTH PANICUM. (I. F. f. 270.) Culms 

 erect from a creeping rootstock, 9-15 dm. tall, glabrous. Sheaths smooth and 

 glabrous; leaves elongated, 3 dm. long or more, 6-12 mm. wide, flat, long-acumi- 

 nate, narrowed toward the base, glabrous, rough on the margins; panicle 1.5-5 

 dm. long, the lower branches 1-2.5 drn. long, more or less widely spreading or 

 sometimes nearly erectj spikelets ovate, acuminate, 4-4.5 mm. long; first scale 



