534 
New Species of Nitella belonging to the monoecious acuminatae 
Group, with a Review of the-allied Species. 
By T. F. ALLEN. 
(PLATES 285, 286.) 
NITELLA STELLARIS N. sp. 
This plant is moderately branched, suberect, about 25 cm. 
high. The stems are about one mm. in diam.; verticils remote 
below, becoming crowded above, consist of eight leaves, spread- 
ing and even recurved. The lower sterile leaves, two to three 
cm. long, are once divided into two to four short terminals, 
the upper fertile leaves are once divided into two rarely three 
terminals. The terminals are one-celled; gradually acumi- 
nate, 180 to 250 » diam. at the middle, and, in the upper 
verticils, 700 to 1400 4 long. The odgonia are aggregated to 
the node of the leaf. The antheridia are about 215 indiam. The 
Odspore 230 to 240 long by 225 broad, with five or six sharp 
ridges, zts membrane quite smooth. (Plate 285.) 
This species differs from JV. subspicata Allen, by the diffuse 
character of its fertile verticils, less condensed than in that species, 
and in forms of the related species, VV. sab-glomerata A. Br.; 
from the latter it may be distinguished by the membrane of the 
Odspore, and its general habit of growth. The proportionate 
length of the terminal to the primary segments of the leaves 15 
generally as two to five. 
The cluster of small leaves at the ends of the longish primary 
segments of the fertile leaves give a stellate appearance to the ends 
of the upper leaves and suggests the name; these, while scarcely 
“condensed,” as the term is usually applied to fertile verticils of 
NVitella, are somewhat suggestive of approximating the «sub- 
glomerata”’ 
most diffuse, followed by capitulifera A., subspicata, subglomerata, 
and culminating in glomerulifera, which bears a dense “head 
of fertile divisions. - ss 
The plant was collected by Mr. J. W. Blankinship, in a pond be 
near Verdigris river, Creek nation, Indian Territory, August 21, 
1895. 
NITELLA CAPITULIFERA N. sp. i a 
Plants diffusely branched, spreading, ten to fifteen cm. long- 
stem flaccid, about 700 in diam. Verticils consist of eight leaves, 
» 
series of this group, of which this may stand as the: = 
