(J. umbrosa.J 
BRITISH JUNGERMANNLE. 
Male Fructification axillary. Anthers in small clusters of three or four in each perigonial 
leaf, ovate, reticulated, situated upon a short, transversely-striated, pellucid footstalk. 
Female Fructification terminal upon the stems and branches. 
Calyx (f. 5) nearly three quarters of a line long, at the base cylindrical, or, when the 
germen has arrived at its full size, ventricose, thence becoming depressed and quite 
flat at the mouth, which is truncate and entire. In texture and color the calyx 
corresponds with the leaves. 
Calyptra (f. 7) obovate, membranous, reticulated, tipped with a short tubular style. At 
its base are a few short and nearly linear barren pistilla. 
Peduncle about half an inch long, white, succulent, striated transversely and longitudinally. 
Capsule (f. S) ovate, brown, opening into four equal, ovato-lanceolate valves. 
Seeds and spiral filaments fulvous brown ; the former spherical, the latter composed of a 
double helix. 
At the time when the plate of J. umhrosa was engraved, my Scotch specimens of this elegant 
species of Jungermannia, were the only ones known as British ; but I have since been able 
to make considerable additions to my description of the plant, by means of others which I have 
lately received from Dr. Taylor and Mr. Mackay, gathered in a fine state, and containing 
both male and female fructification. All of them agree well with authentic individuals sent 
to Mr. Turner by Dr. Schrader, as well as with the admirable character of it, given by the 
latter gentleman in his Syst. Samml. Krypt. Geivdsche. 
The plant has a peculiarly handsome appearance, from the recurved leaves at the apices 
of the stems and branches, which is more striking in the young shoots. It is distinguished 
from its associate, J . nemorosa, by the more narrow lobes of the leaves, their more ovate figure, 
and especially by their being truly serrated (by no means dentato-ciliate), and by the entire 
mouth of the calyx. 
REFERENCES TO THE PLATE. 
FIG. 
1, 1, 1. J. umhrosa , barren plants, natural size. 
2. Fertile plant, natural size. 
3. Barren plant, magnified 6 
4. Fertile plant g 
5. Extremity of a fertile shoot 5 
6. Leaf 2 
7. Calyptra 1 
3. Capsule empty, having discharged its seeds 2 
