Nash : The dichotomous Panicums 580 



branches 2.5-3.5 cm. long: spikelets obovate, 3 mm. long and 

 about 1.5 mm. wide, the first scale a little more than one half as 

 long as the spikeiet, broadly ovate, clasping at the base, 3-nerved, 

 sparingly pubescent, the second and third scales densely pubescent 

 with rather long spreading hairs, 11 -nerved, the second distinctly 

 shorter than the third and the fourth, the fourth scale yellowish- 

 white, oval, 2.5 mm. long and about 1.3 mm. wide. 



Collected by the writer in the high pine land at Eustis, Lake Co., 

 Florida, May 3, 1894, no. 603. Most nearly related to P. viala- 

 con, but distinguished by the less copious pubescence which is 

 much finer and softer, and by the glabrous upper surface of the 

 blades. From P. ciliifcnim it is at once separated by its narrower 

 blades which are not ciliate on the margins. 



Panicum trifolium 



A much tufted perennial, glabrous, with the exceptions noted 

 below. Culms slender, 2-4 dm. tall, finally a little branched : 

 leaves usually 3, rarely 4, the uppermost one much above the 

 middle of the culm and generally but a little below the panicle ; 

 sheaths less than one half as long as the internodes, sometimes 

 but one quarter as long : ligule a dense ring of hairs about 0.4 mm. 

 long ; blades erect or nearly so, firm, lanceolate, often minutely 

 pubescent on the lower surface, the margins thickened and carti- 

 laginous, serrulate and very rough, 1.5-6 cm. long, 1.5-5 m"^- 

 wide, the basal ones numerous, 4-6 cm. long : panicle more or less 

 exserted, broadly ovate, 2.5-6 cm. long, its branches ascending, 

 the larger ones 1.5-3 cm. long : spikelets 1.5 mm. long and about 

 0.7 mm. wide, elliptic, the first scale nearly orbicular, glabrous, 

 I -nerved, one quarter to one third as long as the spikeiet, the 

 second and third scales densely pubescent with short spreading 

 hairs, 7-nerved, the fourth scale white, 1.3 mm. long and about 

 0.6 mm. wide, obtusely and obscurely apiculate. 



In sandy soil. North Carolina to northern Florida, west to 

 Mississippi. Type collected by Dr. John K. Small, in the Ocmul- 

 gee River Swamp, below Macon, Georgia, May 1 8-24, 1 895. The 

 following specimens are also referred here : 



North Carolina : Chapel Hill, W. W. Ashe (distributed as 

 P. ensifoliimi). 



South Carolina: Aiken, 1867, H. W. Ravcnd. 



Florida: Chapman, 1890, no. 3; Apalachicola, 1892, Dr. 

 Geo. Vasey. 



