Nash : The diceiotomous Panicums 573 



hairs, the hiternerves of all but the upper sheatlis minutely pu- 

 bescent : ligulc a dense ring of hairs about 0.6 mm. long: blades 

 broadly lanceolate, thin, a little narrowed toward the sparsely 

 cihate rounded base, the margins minutely serrulate, rough, 6-8 

 cm. long, 6—12 mm, wide: panicle included at the base, 6—8 cm. 

 long, its branches ascending, the larger ones 3-4 cm. long, the 

 secondary panicles smaller: spikelets 3.25-3.5 mm, long and 

 about 1.5 mm. wide, the first scale broadly triangular-ovate, i- 

 nerved, the second and third scales pubescent tow^ard the base 

 with a few scattered hairs, the second scale ir -nerved, the third 



■ 



scale 9-nerved, the fourth scale yellowish-white, 2.5 mm. long and 

 about 1.3 mm. wide, oval, obtusely and obscurely apiculate. 



Collected at Kerrville, Kerr Co., Texas, by A. A. Heller, May 

 14-21, 1894, no. 1759- Differs from P, pernerzosiim in the pu- 

 bescent culm and sheaths, the broader blades of a different shape 

 and the narrow spikelets which are usually sparsely pubescent. 



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Panicum paucipilum 



A tufted perennial, glabrous, with the exceptions noted below. 

 Culms 6-10 dm. tall, finally sparingly branched: leaves 5-8; 

 sheathes one third to one half as long as the internodes, the ex- 

 ternal margin ciliate toward the summit ; ligule a dense ring of 

 hairs about 2 mm. long : blades erect or ascending, thickish, rather 

 firm, sometimes minutely puberulent on the lower surface, usually 

 with a few hair-bearing papillae at the base, the lower and larger 

 6-9 cm. long, 5-7 mm. wide : panicle finally considerably exserted, 

 rather dense, oblong, usually 5-10 cm. long, its branches erect- 

 ascending or erect, the larger ones 2.5-4 cm, long: spikelets 

 numerous, about 1.4 mm. long and 0.8 mm. wide, oval, the first 

 scale about one third as long as the spikelet, i -nerved, orbicular, 

 the second and third scales pubescent with spreading hairs, the 

 former plainly, the latter obscurely, 9-nerved, the fourth scale yel- 

 lowish, about 1.3 mm. long and 0.8 mm. wide, obscurely apiculate. 



In wet soil, southern New Jersey to Mississippi. Type col- 



lected by Mr. E. P. Bicknell, at Wildwood, New Jersey, May 30 



and 31, 1897. The following specimens from Mississippi are also 



referred here : 



Ocean Springs, July 19, 1889, F. S. Earle ; Biloxi, Sept. i, 



1892, S. M. Tracy; Beauvoir, May 13, 1898, S. M. Tracy, no. 



4594 (distributed as P. octonodinn S. & S.). 



Intermediate between P, octonodiim and P, Eatoni, Differs 



from the former, to which it is closely related, in the ciliate margin 



