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culms, and in the size and form of the panicle, and the arrange- 
ment of its spikelets. The culms arise from a creeping base, a 
character about which Lamarck says nothing, his specimens 
probably not exhibiting this feature. It differs from P. agrostoides 
Muhl. in the ciliate margins of the sheaths, in the shorter leaves, 
the smaller spikelets, and the creeping base of the stem. In P. 
agrostoides Muhl. the leaves are much elongated, the margins of 
the sheaths entirely naked, and the culms are caespitose, or at all 
events not creeping at the base. 
The plants in the herbarium of Columbia University to which 
allusion is made, and which are referable to this species, are: 
«|. F. Holton, La Paila, April 19, 1853, No. 91,” sent out in 
his distribution of plants from “ Neogranadina-Caucana.” 
“Graminaceae. Saxicolae. Ripariae. Truandofalls. Schott 
II. 858,” and in red ink “ No. 6.” 
“Dr. Madiana, Turk’s Island.” 
Panicum ATLANTICUM Nf. sp. 
Whole plant, with the exceptions noted below, papillose-pilose, 
with long white spreading hairs, the hairs on the upper surface of 
the leaves and on the summit of the culm scantier, those on the 
lower surface of the leaves shorter. Culms caespitose, at length 
branched, 3-5 dm. tall, erect or ascending, the nodes barbed with 
. spreading hairs, a bare ring about I mm. long below each node; 
sheaths shorter than the internodes; ligule a ring of hairs 2-5 mm. 
long; leaves erect, rigid, thickish, linear-lanceolate, 3-10 cm. long, | 
4-7 mm. wide, acuminate, rough on the margins, 7~-11-nerved, the 
middle leaves the longest; panicle broadly ovate to orbicular, 4-6.5 
cm. long, 3-7cm. wide, its main axis somewhat pilose at the base, 
the remaining portion, as well as the ascending somewhat flexuous 
-branches and their divisions, hispidulous, the lower branches 
2.5-4.5 cm. long; spikelets many on hispidulous pedicels several 
times their length, obovate, about 2 mm. long, about 1.3 mm. 
broad, obtuse, the first scale about one-half as long as the spikelet, 
broadly ovate, acute, sparingly pubescent, I-nerved, the second 
and third scales equal in length, membranous, orbicular when 
spread out, 9-nerved, densely pubescent with short spreading 
hairs, the third scale enclosing a hyaline palet about one-half its 
length, the fourth scale chartaceous, oval to almost orbicular, about 
1.75 mm. long, enclosing a palet of equal length and similar tex- 
ture. 
Type specimens collected by the writer on dry somewhat 
shaded knolls in the grounds of the New York Botanical Garden. 
