(J. asplenioid.es.) 
BRITISH JUNGERMANNIiE. 
Surculi either erect or procumbent, throwing out a few fibrous radicles from their base, 
and here and there from the whole extent of their lower surface, about the thick- 
ness of common packthread, from two to four or five inches in length, flexuose, now 
and then beset with simple ramuli, or furnished with young shoots, which, in then- 
more advanced period of growth, resemble divisions of the sureulus. The color 
varies from a dull green to a reddish brown. In substance the surculi are firm, but 
flexible, the cellules very compact. 
Leaves from one to two lines in length, alternately placed in two rows on each side of 
the sureulus, often closely arranged towards its extremity ; the rest more or less 
remote : all of them are horizontal, having the ends slightly recurved, so as to 
present a convex upper surface ; their base is semiamplexicaul, the lower margin very 
decurrent : in shape the leaves are obovate approaching to round, their margins 
either entire (f. 4), slightly dentate (f. 3), or, as is most frequently the case, 
dentato-ciliate (f. 5), and this in so striking a manner as to be often visible to the 
naked eye. The color is a dull yellowish green. The reticulation small in proportion 
to the size of the leaf, formed of roundish cellules. 
Perigonial leaves ten or twelve in number (f. f. 3. and 6), closely imbricated on each 
side of the sureulus and entirely surrounding it, roundish, concave, ventricose at the 
base ; the margins more or less dentato-ciliate, some of them a little recurved. 
Periclicetial leaves exactly resembling the cauline ones, only that they have their lateral 
margins more recurved and often revolute: they are, too, erect. 
Male fructification in the axilke of the perigonial leaves, and sometimes situated, also, in 
various parts of the sureulus, but most frequently occupying the extremity. The Anthers 
(f. f. 13. 14) are in clusters of from two to four or five: they are ovate, when perfect of 
a greyish color. I have seen the apex open, whence the pollen has been discharged, leaving 
the cuticle white, pellucid and reticulated. The filament is about half the length of the 
anther, white, transparent, transversely striated. 
Female fructification terminal upon the surculi and shoots. Occasionally, too, lateral, or, 
perhaps, only appearing so in consequence of the production of a shoot immediately beneath 
it (f. 2). 
Calyx (f. 7) from two to three lines in length, generally leaning on one side, so as to 
be somewhat scymitar-shaped. The base is almost cylindrical, the mouth truncate, 
very much compressed (except when forced apart by the capsule and peduncle) : the 
opening extends a little way down on one side of the calyx, where, as well as on 
the whole of the upper margin, it is dentato-ciliate. In color and texture the calyx 
exactly resembles the leaves. 
Calyptra (f. 8) obovate, or rather pyriform, tipped with a short style, of a delicate 
texture, strongly reticulated at the base: it is surrounded by numerous barren pistilla, 
each of which is lineari-lanceolate, longitudinally and transversely striated; the 
mouth is open and a little expanded. 
Peduncle from an inch and a half to two inches long, white, shining, loosely cellulose. 
It is inserted into the receptacle by means of a fibrous bulb (f. 10), of an obconical 
shape, which is with ease drawn out along with the peduncle. A similar cluster 
