348 
Type collected by Dr. John K. Small at Darien Junction, Mc- 
Intosh Co., Ga., June 25-27, 1895. Itis related to P. leucothrix 
Nash, in habit, but the longer and more robust culms, the sheaths 
which are longer in proportion to the internodes and much less 
hirsute or glabrous, and the larger panicle and spikelets make 
manifest its specific validity. 
I would also refer to this species the grass collected by Mr. A. 
H. Curtiss, near Jacksonville, Fla., on May 4, 1893, No. 4033, and 
distributed as P. mzttdum Lam. The panicle and spikelets are 
somewhat smaller, but in other respects it agrees. 
Y PANICULARIA BOREALIS N. sp. 
Plant glabrous throughout. Culms 6-15 dm. tall, from a 
creeping base, smooth, erect ; sheaths loosely embracing the culm, 
over-lapping, smooth or roughish, the terminal one often embrac- 
ing the base of the panicle; ligule 5-15 mm. long; leaves 9-23 
cm. long, 2-10 mm. wide, erect, rather abruptly acuminate, rough 
on both surfaces toward the apex, the upper surface also often 
rough throughout, the smaller leaves usually conduplicate, at least 
when dry; panicle, sometimes nearly simple, 1.5—5 dm. long, its 
main axis smooth, with the lowest internode 6-11 cm. long, 
branches erect, smooth, single, or in 2’s or 3’s, the lower bearing 3-12 
spikelets 4-15 cm. long; spikelets 10-17 mm. long, 7-13-flowered, 
appressed, on pedicels shorter than themselves, the empty scales 
with a broad scarious margin, [-nerved, smooth and shining, the 
first acute or obtuse, one-half as long as the second, which is ob- 
tuse and erose at the apex and one-half to two-thirds as long as 
the first flowering scale, flowering scales 3.5-4 mm. long, about 
three times as long as the internodes of the rachilla, thin, a broad 
scarious margin at the obtuse and erose apex, 7—nerved, the nerves 
hispidulous, palets hyaline, slightly shorter than the scales, nar- 
rowly elliptic, shortly 2-toothed at the obtuse apex, 2-nerved, the 
nerves green and narrow!y winged, the wings serrulate ; stamens 
about I mm. long. 
In water or wet places from Maine to the Catskill Mts., N. Y.. 
Idaho, California and Washington, and northward. 
The smaller spikelets with thin flowering scales, which are 
hispidulous on the nerves only, clearly separate this from P. 
fluitans (L.) Kuntze, in which the flowering scales are hispidulous 
all over the back, and of much firmer texture. 
I would refer to this the following specimens : 
Fernald, Van Buren, Me., July 25, 1893, No. 193. 
Nash, Cairo, N. Y., July 10, 1893. 
