(J. heterophylla.J 
BRITISH JUNGERMANNIiE. 
placed, in different individuals, plane, or veiy slightly concave, bifarious, horizontal, of 
an ovate figure approaching to round, at the base semiamplexicaul and decurrent, at 
the extremity varying in a very remarkable manner, whence the species has most justly 
been named, by the acute Schrader, heterophylla. Scarcely two individuals are found to 
correspond exactly, throughout all the leaves, in the figure of this part, though, in 
general (f. 2), it may be considered as being, in those placed nearest to the base of the 
stem, acutely divided for about one fifth of its length from the apex into two acute 
segments, which are divaricate in a slight degree; while those of the middle of the 
surculus have it obtusely emarginate, with the segments also obtuse, sometimes truncate, 
without any notch ; and, as the leaves approach the extremity of the plant, they are 
quite entire, rounded otf, and frequently more ovate than the rest. In other specimens, 
however, the leaves are sometimes all emarginate (f. 4), or, here and there, and without 
any kind of regularity, intermixed with some that are entire, whilst others are acutely 
cleft; and I have lately received from Mr. Ly ell specimens, among which were individuals 
having their leaves so nearly entire throughout, that, had it not been for the calyx and 
stipules, they might easily have been mistaken for a distinct species. In all, the color is 
a pale green, varying, from situation, to a deeper hue: the cellules large and ovate. 
Perigonial leaves , as those of J. bideutala, closely imbricated in two rows, at the base 
ventricose, the extremity somewhat revolute, emarginate or entire: they are found as 
well upon the same plant u ith the female fructification, as upon different individuals, 
and often immediately below the perichcelial leaves (f. f. 9. 10. 11) : 
These are still more remarkable for their difference of form than the cauline ones: in some 
they are altogether entire; in others both bifid and entire; whilst some again are found 
which have the third pair from the calyx very obtusely emarginate (f. 11), with blunt 
segments; the second pair deeply, but obtusely, emarginate, with acute points, and 
these slightly dentated (f. 10); and the first, or calycine pair, varying with two or three 
acute, ovate segments, of different sizes, distantly and unequally toothed (f. f. 9.9); 
these last are generally erect and appressed to the lower part of the calyx. 
Stipules (f. f. J. 8) one to each pair of leaves, appressed to the lower side of the stem, 
oblong, bifid or trifid, with the segments more or less divaricating, and here and there 
toothed or laciniated. 
Male Fructification. Anthers situated in small clusters, exactly resembling those of 
J. bidentata. 
Female Fructification terminal upon the extremity of the surculi and short branches, as 
well as upon some so short, that, without a careful examination, they might be supposed to be 
lateral. 
Calyx (f. 12) scarcely three quarters of a line long, ovate, with the sides very obtusely 
triangular, or even round (supposing a transverse section); the mouth expanded, slit 
some way down on one side, and much laciniated. 
Calyptra ovate, thin, . and delicate. I have gathered plants which had (probably in 
consequence of weakness in the capsule or footstalk) carried up the calyptra entire, 
with the fiuit, as in the mosses, and, though not in so perfect a state, in Andrrea (f. 13),. 
