( 434) 
lis relationship with that species is not close, its affinities be- 
ing with A. Virginicus and A. longiberbis, from the former 
of which it is distinguished by its glabrous sheaths and much 
stouter racemes; and from the latter, to which it is more 
nearly related, by the entire absence of the lanose pubescence 
so characteristic of A. longiberdbzs. 
PasPpALuM EGGERTIHI. 
A tufted perennial. Culms 4-6 dm. tall, with usually a 
raceme-bearing branch in the sheaths ; leaves 2; sheaths some- 
what compressed, the basal ones pubescent, the others ciliate 
on the margin; ligule consisting of hairs about 1 mm. long ; 
blades erect or nearly so, acco or linear- lanceolate, 
main culm, and generally stngle on the branches, the former 
ones long exserted, the latter partly included or somewhat 
exserted, 4-5 cm. long, the rachis narrowly winged, less 
than one-half as broad as the spikelets; spikelets about 2.2 
mm. long and about 1.5 mm. wide, oval or a little obovoid, 
in pairs, the first scale densely pubescent with spreading 
hairs, 3-nerved, the second scale more sparingly pubescent, 
2-nerved by the suppression of the midnerve, the flowering 
scale yellowish white, about one-half as thick as bro 
On sandy river-banks, Arkansas. Type in the errr 
of Columbia University, collected by Mr. H. Eggert near 
Pine Bluffs, Jefferson Co., Sept. 4, 1896. In general ap- 
pearance somewhat suggesting P. longepedunculatum and 
distributed as that species by Mr. Eggert, but the leaf-blades 
are naked on the margins. 
PASPALUM GEMINUM. 
A glabrous or nearly glabrous perennial. Culms com- 
pressed, erect, from a decumbent base, 5-7 dm. tall; leaves 
about 5; sheaths ee keeled toward the summit; 
ligule es about . long; blades erect or nearly so, 
linear-] , flat, folded when dry, the lower ones 10-12 
cm. long, 8-10 mm. wide, the uppermost blade very small: 
racemes usually 3, spreading, 4-6 cm. long, the rachis 
winged and about two-thirds as wide as the spikelets: spike- 
lets in pairs, elliptic, about 3 mm. long and 2 mm. wide, the 
