(J. complanata.J 
BRITISH JUNGERMANNIiE. 
Plants densely imbricated, so as to form wide but compressed tufts, or cushion-like patches. 
Roots proceeding rarely from the lower side of the stem, more frequently from the leaves, 
always in small pencil-like tufts, consisting of pellucid, simple fibres (f. 3). 
Stems, or Surculi, from an inch and a half to two inches or more in length, creeping, 
fiexuose, variously branched, the branches again divided in a pinnated manner, and here 
and there producing innovations. Color green. 
Leaves closely imbricated over the upper surface of the stem, and in a bifarious manner, 
unequally two-lobed, the superior lobe much the largest, orbicular, nearly flat upon the 
upper side (in (3 convex) ; the inferior lobe ovate, appressed, flat, and often shooting 
forth roots. The color is a very pale yellow-green; in /3 alone yellow-brown. The 
substance is delicate and flaccid; the reticulation small and obscure (f. 18). 
Perigonial leaves (f. 5) similar to the rest, but more ventricose at the base, where the 
Anthers are situated. 
Perichcetial leaves also but little differing from the cauline ones, except in having the two 
lobes more equal in size (f. f. 8. 9). 
Stipules none. 
Male Fructification situated in the axillae of young lateral shoots (f. f. 2. 4). 
Anthers two or three in the axilla of each leaf, globose, reticulated, yellowish, supported 
on cellular, whitish, short footstalks (f. f. 6. 7)> 
Female Fructification terminal upon the branches, and on the lateral shoots (f. 2). 
Calyx oblong, from a cylindrical base becoming wider, compressed, and at the extremity 
quite flat, incurved before the putting forth of the capsule; the apex truncate, nearly 
entire, or only a little cleft on one side. (In a very young state (f. 9) the calyx is shorter 
and wider than that just described (f. f. 11. 12), but still very much compressed.) 
Pistilla five to seven in each calyx, oblong, slightly swelling towards the base, at the 
mouth expanded and toothed, or radiated (f. 12), of a pale and almost white color, faintly 
striated transversely and longitudinally. 
Calyptra pyriform, whitish, pellucid, reticulated, tipped with a short style. 
Peduncle not more than twice the length of the calyx, white, succulent, cellulose. 
Capsule ovate, pale brown, transversely and longitudinally furrowed (f. 13). 
Seeds rather large, spheerical, brown, as well as the spiral filaments, which are formed of a 
double helix. 
Gemma are attached to the margins of the leaves in the spring months (f. f. 9. 15), and are 
of various sizes, of a roundish or ovate figure (f. 16), compressed, evidently reticulated, 
so as to resemble in texture the leaves. 
Jungermannia complanata is a species but little subject to variation, nor have I seen any 
appearance of it sufficiently unlike the common to be worth mentioning, except the small brown 
one found on rocks in Ireland, by Miss Hutchins, and described above, and represented at f. 17. 
Although, in general habit, evidently allied to that beautiful family to which J. Tamarisci, 
J. dilatata, J. platyphylla , &c„ belong, the plant before us is, nevertheless, abundantly distinguished 
from them by a total want of stipules ; of which part Dr. Roth has, notwithstanding, maintained 
