345 
ing branches, the larger of which are 2-2.5 dm. long; internodes 
of the rachis densely pubescent with silky hairs,6-8 mm. long, the 
lower internodes much exceeding the spikelets; spikelets 4-5 mm. 
long, one-half as long as the basal hairs, and about one-half again 
as long as the clavellate pedicels, which are pubescent with very 
short appressed hairs, and also with fewer long ascending hairs; 
outer scales of the spikelet pubescent with long hairs, at least at 
first, the first scale slightly 2-toothed at the apex, the second sim- 
’ ilar, but not so distinctly nerved, the third scale pubescent on or 
near the margins toward the apex, the fourth scale glabrous, or 
with a few hairs at the apex, purple on the margins, acuminate 
into a scabrous, untwisted, straight or somewhat contorted awn 
about 2 cm. long. 
Collected by Mr. W. T. Swingle in a wet hammock between 
Paola and the Wekiva River, along the J. T. & K. W.R.R., on 
Aug. 22, 1894, No. 1732a of my first distribution of Florida plants. 
The elongated branches of the panicle, the long internodes of 
the rachis, and the longer basal hairs of the spikelet distinguish 
this at once from any form of £&. saccharoides, to which it is re- 
lated. 
PANICUM AGROSTIDIFORME Lam. Ill. 1: 172. 1791. 
This name was given by its author to a grass from South 
_ America, probably from Cayenne, and its application to the plant 
so common in our region, the P. agrostoides Muhl., has never been 
Satisfactory, not only because the description failed to fit our 
plant, but also on account of the remoteness of the region from 
which the Lamarckian plant originally came—a region the flora 
of which is tropical and not likely to contain among its members 
a grass native and plentiful in the eastern United States. A care- 
ful comparison of a fuller description of this plant, in Encycl. 
Meth. (4: 748. 1797), with material from northern South Amer- 
ica, where this grass was originally secured, leaves little doubt as 
to its proper identification. Among the characters given by 
Lamarck is that of the ciliate margins of the sheath fissure. 
There are three specimens in the herbarium of Columbia Univer- 
sity which show this character in a marked degree, one of them 
from northern South America, another from Turk’s Island, W. L., 
and the third from Truando Falls, on the Isthmus of Panama, col- 
lected by Schott. These specimens agree with the description of 
Lamarck, in the height and the jointed and leafy character of the 
