J. trilobata. 
BRITISH JUNGERMANNI/E. 
stipule : they are beset with minute foliaceous scales, jagged at the extremity, which 
«eem to be the rudiments of leaves and stipules : immediately at the base, however, 
these are imbricated all round. 
Leaves more or less closely placed, and imbricated on the upper side of the stem, horizontal, 
distichous, attenuated, of an ovate figure, cut at the end into three obtuse teeth. They 
are of a firm texture, composed of small roundish reticulations : the surface is a little 
shining, of an olive green color, varying with more or less of a brown tint, in proportion 
as they are more or less exposed to the sun (f. f. 6. 9). 
Perigontal leaves situated upon short, proper branches, or innovations (f. 6), closely imbri- 
cated, so as wholly to conceal the stem and stipules,- their form is narrow and ovate, 
with a remarkably ventricose base ; the end, as in the cauline leaves, cut into three, and 
sometimes four, obtuse and usually unequally-sized teeth. 
Perichatial leaves embracing the base of the calyx, composed of small ovate membranaceous 
scales, jagged at the extremity. 
Stipules, one to each pair of leaves, widely subquadrate, notched. 
Male Fructification situated in the axillae of the perigonial leaves (f. f. 6. 11). 
Anther spherical, reticulated, terminating a small white filament. 
Female Fructification standing on short, proper footstalks, arising from within the stipules, 
from the under side of the plant, curved upwards. 
Calyx nearly two lines in length, oblong, narrower upward, the mouth slit down on one 
side, destitute of teeth : its texture membranaceous and reticulated under a highly 
magnifying power; its color nearly white. 
Calyptra oblongo-obovate, tipped with a short style, splitting vertically for the emission of 
the capsule (f. 14). 
Peduncle from an inch and a half to two inches long, somewhat flexuose, pellucid, white, 
cellulose. 
Capsule ovate, dark shining brown. 
Seeds and spiral filaments brown : the latter composed of a double helix ; the former spherical. 
The var. /3 and y differ principally from a in size : the /3 being intermediate, about half the usual 
size of a, yet, in other respects, resembling it. Its fructification, as I have lately ascertained 
by a great profusion of specimens gathered in Switzerland, is precisely the same, y has more 
distantly-placed leaves, and these so small, that they are scarcely visible to the naked eye. Of 
the teeth, there are frequently only two, and sometimes none. 
Jungermannia trilobata, although no uncommon inhabitant of various alpine countries in 
Europe, still does not appear to have been described by any author in perfect fructification. Roth’s 
character of this state of the plant so ill accords with our own, that I cannot help suspecting that 
he must either have mistaken J. quinquedentata for it, or else have confounded the two. In this 
country, I am not aware that even calyces have been found, and I have been obliged myself to 
have recourse to German individuals for the whole of the drawing of the fructification. 
