C J. compressa.j 
BRITISH JUNGERMANNIAE. 
Of the stipules, I have been able to discover none upon the principal stems ; but, on the 
young innovations, both Dr. Taylor and myself have seen them of an ovate form, 
extremely minute, sometimes entire, sometimes notched or bifid (f. 6). Similar stipules 
have, since the publication of J. Sphagni, been discovered upon the gemmiferous shoots of 
that species likewise. 
The perichcetial leaves are no otherwise different from the rest, than in being somewhat 
larger: three or four pair (f. 7) arise from the exterior surface of the calyx, in such a 
manner as wholly to cover it. 
Male Fructification at present unknown. 
Female Fructification terminal. 
Calyx * immersed in the pericluetial leaves, oblong or club-shaped, of a very thick and 
subcarnose texture every where, except at the margin, where it has a more foliaceous 
appearance, and is divided into four large acute and equal-sized teeth or segments (f. 8). 
Calyptra ovate, thin, delicate, reticulated, tipped with a small style. 
Peduncle four or five times the length of the calyx, white, striated transversely and longi- 
tudinally. 
Capsule spherical, red-brown, splitting into four equal, ovate valves, and discharging the 
seeds and spiral filaments, of which the former are exactly spherical, and, as well as the 
latter, of a fulvous color. 
Notwithstanding the peculiarity in the general habit of this interesting discovery of Miss Hutchins, 
arising from the curious disposition of the leaves and their general texture, it is difficult to fix upon 
a satisfactory specific character that will distinguish it from J. Taylori, without the aid of the 
fructification, the discovery of which we owe to the Botanist after whom the latter plant is called. 
The trivial name has been suggested by mv excellent friend, Mr. Lyell, to whom I communicated 
specimens, and whose remarks upon the sterile individuals are so excellent, that my readers will 
thank me for transcribing them unaltered and unabridged from his letter. “ A cursory view of a 
young innovation made me suspect that Miss Hutchins had got hold of my J. hyalina f, and the 
general figure of the plant recalled a specimen of J. scalaris sent me by Mr. Templeton. But 
J. compressa is less transparent than J. hyalina, and more so than J. scalaris usually is ; the reti- 
culation is smaller than in either ; and the outer row of cellules smallest, which is very uncommon. 
— Moreover, it is of upright growth, and sends out no radicles from the stalk, differing in that 
respect from the two above-named Jungermannice, and from J. Taylori. The leaves are circular, 
imbricating and becoming gradually larger towards the apex of the stalk. They are bifarious, and 
the insertion is nearly at right angles to the stalk ; so that, when viewed laterally, they project on 
* In the present species, as well as in J. scalaris and J. emarginata, ar.d possibly in all the Jungermannice which 
have an immersed calyx, this part has the appearance of being nothing more than the extremity of the stem 
incrassated, and hollowed out for the reception of the pistilla ; for the texture of the calices always resembles that of 
the stem ; and they are never deciduous, as is the case with the exsertecl calices. 
T A new species that will shortly appear in this Monograph. 
