573 Nash : The dichotomous Panicums 



hairs, the internerves of all but the upper sheaths minutely pu- 

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

 broadly lanceolate, thin, a little narrowed toward the sparsely 

 ciliate 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, .1- 

 nerved, the second and third scales pubescent toward the base 

 with a few scattered hairs, the second scale 11 -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. pernervoswn in the pu- 

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

 and the narrow sp kelets which are usually sparsely pubescent. 



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. octotioduju and P. Eatoni. Differs 

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



