BRITISH JUNGERMANNIiE. 
C J. hyalina.) 
JUNGERMANNIA HYALINA. 
(TAB. LXIII. ) 
Jungermannia, caule ascendentc, flexuoso, dichotomo: foliis erecto-patentibus, rotundatis, 
subundulatis : fructu terminali; calycibus ovatis, angulatis ; ore contracto, quadridentato. 
Jungermannia hyalina. Lyell, m.s.s. 
Hab. Boggy places in the New Forest, Hants.) and among the rocks immediately above 
Stock-gill Force, a waterfall near Ambleside. Mr. Lyell. — Sefing mountain, near Dublin. 
Dr. Taylor. — (It bears fruit in the early spring months.) 
Plant forming broad tufts of a deep green:— if unexamined, it might be easily passed by as 
J. undulata in a dwarf state, though its shining and glassy appearance is likely to attract the eye 
of the Botanist, who is at all conversant with the genus. 
Roots dense, simple, pellucid fibres, proceeding generally from the whole length of the 
under side of the stem, which latter, as well as the roots, is of a deep purple. 
Stem either wholly procumbent, or, as is much more frequent, ascendant in the greater part 
of its length, simple, or much branched with innovations, so as to look dichotomous. 
Leaves (f. 8) bifarious, rather distantly placed, erect or erecto-patent, loosely imbricated, 
round, embracing the stem, and in places often concealing it} their texture extremely 
thin, membranous, shining and subdiaphanous ; the cellules round, the marginal row 
being largest} color a deep bright green. 
Perigonial leaves (f. 3) situated near the extremity of the stem, undulated liKe the rest, and 
differing in no respect, but in having a swollen or ventricose base. 
The PerichcEtial leaves (f. 9), which sometimes extend far below the apex of the stem, enlarge 
upwards from their base, so as to be broadly ovate, and are also undulated. 
Male Fructification (f. 3) in the axillae of the perigonial leaves. 
Anthers spherical, of a pale, olive-brown color, reticulated, placed upon a short white 
footstalk. 
Female Fructification (f. f. 6. 7-9) terminal upon the stems. 
Calyx (f. 9) ovate, broad at the base, bluntly angular, the mouth contracted, cut into 
four teeth. 
