BRITISH J UN G E I? MANN 1 JE. 
(J. liident ata.J 
Peduncle about three quarters of an inch in length, white, succulent, cellulose, a little 
waved when it has reached its full height. 
Capsule exactly ovate, deep brown, longitudinally and transversely furrowed, splitting, at 
maturity, into four equal valves. 
Seeds and spiral filaments (f. 10) of a rich, fulvous brown; the former spherical, the latter 
composed of a double helix. 
/3 I am induced to notice as a distinct variety, because, among the many specimens I have 
examined, I have scarcely found any differ at all from the figure here given. It is generally of 
a larger size than cc, and simple; the stem and leaves darker; the latter slightlv concave and 
obtusely emarginate at the extremity, with the points or segments more or less blunt. The 
stipules, too, I have always remarked, are more irregularly divided into more numerous lacini®. 
J. bidentata may be reckoned among the most common of the tribe, and I was formerly of opinion 
that it might also be considered as one of the most distinct, till my friend, Mr Francis, pointed 
out to me the Var. B growing in the vicinity of his residence; and Miss Hutchins kindly 
communicated a plant, which, though it has many peculiarities in common with the present 
species, yet has marks of discrimination so striking, that I am induced to reserve a more full 
description of it for another part of this publication. It will be sufficient in this place to observe, 
that it is distinguished from J. bidentata in having the leaves cut into three, more frequently than 
into two, segments; and in either case they are very distinctly, but irregularly, toothed. In the 
perichcetial leaves this denticulation is still more obvious. The stipules, also, instead of being 
variously laciniated, are regularly bifid, with the segments only slightly toothed. The characters, 
which distinguish J. bidentata from J. heterophylla, will be enlarged upon in the following- 
description; so nearly, however, do the two plants approach, that, by some writers on the subject, 
they have been looked upon as mere varieties of each other.; and, indeed, such was formerly my 
own opinion. 
The agreeable smell that has frequently been noticed as diffused by this plant, appears to be by 
no means confined to it alone. Dr. Schrader under his J. graveolens (which appears closely allied 
to our J. trichomanis ) remarks “ Odor plant® recentis gravis, Scandici Cerefolio hand dissimilis.” 
In J. bidentata I have observed the scent to be more powerful after the plant had been dried for a 
few days, and then recovered by an application of moisture. 
On this Jungermannia I have more than once had the opportunity of observing that pistilla are 
formed before the calyx, and, by examining the terminal clusters of leaves*, they may not 
* Such leaves I have generally found to be divided into two, three, or even four segments, at the extremity, 
and these varying much in size and direction. Is it not possible that these may unite and form the calyx ? An 
incision, more or less deep, is generally seen in one or other of the angles, as if the leaves (supposing such a 
change to take place) had not been united quite to their apices. The same appearance, also, may be remarked in 
J. heterophylla (see t. 31./. 12.), in J. asplenioides , and J. spinulosa. 
