( J. DicksoniJ 
BRITISH JUNGERMANNI.T:. 
Perigonial leaves (f. 10) more closely placed than the rest, with which they are intermixed, 
and are scarcely different in figure, except in having their base swollen for the reception 
of the anthers. 
The Perichretial leaves (f. 7) also much resemble the cauline ones : they are erect and 
embrace the lower part of the calyx with their segments. 
Male Fructification situated in the axillae of the perigonial leaves; in each of which are placed 
two or three, nearly spherical, reticulated anthers, each supported by a white transversely 
striated footstalk, which is about equal to the anther in length. 
Female Fructification terminal. 
Calyx (f. 3 ) half a line long, ovate, longitudinally plicated, the mouth a little contracted 
and toothed; in texture it nearly resembles that of the leaves, as does the color also, 
except that towards the mouth it becomes white, and, as it were, scariose. 
Calyptra (f. f. 3. 9) small, ovate, of a delicate membranaceous texture, reticulated; 
style short. 
Peduncle two or three lines long, white, succulent, cellulose. 
Capsule ovate, approaching to round, both longitudinally and transversely furrowed, 
and remarkable for being of a pale, and rather bright red color. The four valves are 
ovate, and of an equal size. 
Seeds and spiral filaments (f 9) fulvous, approaching to red: the former spherical, the latter 
short and composed of a double helix. 
There are few naturalists to whom Cryptogamic Botany is more indebted than to Mr. Dickson. 
In the genus Jungermannia his numerous additions to the list of the British species are well known. 
The present is one ot many collected since the publication of the fourth fasciculus of his Ptantce 
Cryptogamicce, in the Highland Mountains of Scotland, which he kindly communicated to me; 
and I have great pleasure in distinguishing it by his name. I have already noticed it under the 
descriptions of J. albicans and J. obtusifolia, next to which it most naturally ranges, differing 
from both in the ovate and sharp segments of the leaves, which are quite destitute of any 
appearance of a nerve. The pale red color of the capsule affords a very obvious and striking 
mark, when the plant is in a forward state of fructification. The greater part of the annexed 
figure was drawn from Mr. Dickson’s original specimens, but the male and female fructification 
have been added from others lately gathered by Mr. Lyell. who alone has found the plant in that 
state. 1 ought to remark that, in general, the individuals collected bv the latter gentleman 
have their leaves more crowded than appears from the plate, though, in other respects, they 
exactly agree with Mr. Dickson’s specimens, as do, in every particular, those gathered by 
Dr. Taylor. 
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