DuRING THE SUMMER OF IQOI 325 
acute, exceeding the peduncles, and the capsule is oblong instead 
of globose. My specimens were completely submersed, while 
M. Aubleti usually grows in sandy bogs rather than in ponds. I 
have not been able to detect any essential difference in the finely 
sculptured seeds, however. 
On August 12 1 saw what was probably the same plant in 
Decatur County, but did not collect it. There are quite a number 
of specimens referable to this species in the U. S. National Her- 
barium and that of Columbia University, mostly from Florida. 
Xyris SMALLIANA Nash, Bull. Torrey Club, 22: 159. 1895 
Collected on the morning of July 19 (no. 1096) in a shallow 
pond in the woods south of Omaha, Stewart County, where it was 
abundant, and accompanied by Panicum digitarioides, Scirpus 
cylindricus (no. 1095), Pontederia cordata, Castalia odorata (no. 
1097), Brasenia purpurea, Limnanthemum aquaticum, Monniera 
Caroliniana, Utricularia purpurea and other interesting plants. 
Previously reported only from the type-locality in Florida. 
v Xyris scabrifolia sp. nov. 
Plants solitary, grayish green. Roots fibrous: stem with a 
slightly bulbous base 6-8 mm. in diameter, enveloped in the pale 
striate membranous sheaths of the leaves: leaves 1-3, usually 2, 
erect, acute, slightly twisted, 3-4 dm. long, about 3 mm. wide at 
the middle, tapering below (about 1.5 mm. wide just above the 
sheath), the whole surface of the blade minutely transversely 
rugose ; uppermost sheath 12-15 cm. long, very obliquely trun- 
cate, acute: scape 5—7 dm. tall, 1-2 mm. in diameter, terete except 
for a minute longitudinal ridge on one side, pale and rugose like 
the leaves: head oblong, about 12 mm. long and 8 mm. thick at 
maturity : scales oblong, entire, the largest 7-8 mm. long : lateral 
sepals lanceolate, about 3 mm. long, the narrow wing of the keel 
lacerate above the middle: corolla yellow. 
This species seems nearest to X. Caroliniana Walt., but differs 
from that and all other species known to me in the rugose, almost 
scabrous, surface of its leaves and scapes. This peculiar rugosity 
makes it as rough to the touch as some species of Eguisetwm, such 
as £. laevigatum. It differs further from X. Caroliniana in its 
terete scape and pale sheaths. It is a very slender plant, resem- 
bling in this respect X. flexuosa Muhl. (especially southern speci- 
mens of that species). 
