( J. connivens. i 
BRITISH JUNGERMANNIiE. 
r J'he pericluetial leaves (f. 7) vary in number from five to ten, and occupy the short 
ramuli that support the fruit to the exclusion of such leaves as are produced on the 
rest of the plant, from which they differ materially in shape ; the exterior ones being 
bifid or trifid, with lineari- lanceolate and strait segments ; the intermediate ones more 
oblong in their figure, with trifid extremities, as in the former; while the interior 
are oblong, divided into four or five linear, erect segments, forming what might be 
called a palmate leaf. The cellules of all resemble those of the cauline leaves ; the 
color is somewhat paler. 
Male Fructification at present unknown. 
Female Fructification supported upon short branches, evidently destined to this sole 
purpose, which are situated at the base of the surculi, and are, consequently, central with 
regard to the whole plant. 
Calyx (f. 6) large in proportion to the size of the plant. I have observed it to be 
nearly a line in length, oblongo-ovate, attenuated at the base, of a whitish color, 
semi-transparent, elegantly marked with oblong reticulations, formed by the areolae, 
or cellules, which are more compact than is the case in the leaves : the mouth of 
the calyx is contracted, and fringed with five or six erect cilia. 
Calyptra (f. 8) ovate, whitish, reticulated, tipped with a short style, and surrounded at 
the base by a few 
Barren pistilla (f. 9) of a greyish color, obscurely marked with longitudinal and trans- 
verse lines, of which some of the former are of a red color. 
Peduncle rather more than a quarter of an inch in length, white, succulent, vasculose. 
Capsule (f. 10) ovate, of a deep brown color, evidently, under the higher powers of a 
microscope, longitudinally and transversely furrowed. 
Seeds and spiral filaments (f. 11) a rich chocolate brown; the former spherical, the 
latter formed of a double helix. 
J. connivens , though it does not appear to be a very local species, was entirely unnoticed, 
till Mr. Dickson described it in his valuable publication on British Cryptogamic Botany; nor 
do I find it has been mentioned by any subsequent author. From Sweden I have received 
specimens by the kind communications of Dr. Swartz, under the name J. limosa mss., with 
the remark “ rara species in argilla extensa.” Its fructification appears to be extremely rare. 
I never saw it, except upon a specimen which I found in a boggy part of Holt Wood, in the 
beginning of April, and upon others which I have received from Mr. Lyell in the present 
month of May ; indeed, at the moment the description is going to the press. 
The deeply emarginate leaf, with its rounded sinus and acute connivent segments, not 
unaptly compared to the form of the new moon, will at all times readily distinguish this 
species from all the rest of the genus, even if the calyx should not be present, which is 
equally unlike that of any other Jungermannia, and is rendered singularly beautiful by the 
delicacy of its texture (a peculiarity it has in common with every other part of the plant), 
and by the ciliated orifice. 
