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Jungermannia Pearsoni, Spruce Journ. Bot.,
Feb., 18 8 1, p. 33; Carr, and Pears. Exs. No.
165, 239.
On wet xocVs.— {Plate 4, fig. g y )
Dioicous, small, depressedly cæspitose, lurid
green, resembling Cephalozia divaricata. Stem
8 mm. long, flaccid, twice, or rarely more, furcate,
radicles very rare. Leaves distant, rarel)- contiguous,
transverse, broadly wedge-shaped, complicately
keeled, bifid three-quarters down, keel making
a broad angle with the stem ; segments suberect,
nearly parallel to the stem, rather plane, ovate,
subacuminate, acute or rather obtuse ; cells
minute, subquadratc. Andræcia placed ’in the
middle of the stem or branch ; bracts few, three to'
four, larger than the leaves, crowded, base turgid,
sometimes with an antical incurved tooth ; anthe-’
ridia large, solitary on long pedicels.
Jungermannia orcadensis, Hook.
Stem erect, nea r ly simple ; leaves bifarious,
incumbent, appressed or rather spreading,
ovate, obtuse ly emarginate, margin re vo lute ;
s t ipules none.
Jungermannia orcadensis. Hook. Br. Jung. t.
71 ; Gott. and Rabh. Exs. No. 40, 399, 400 !
C o o ke Hep. f. 76 ; Carr, and Pears. E x k 245!
Mesophylla orcadensis, Dumort. Hep Eur
p. 1 30.
In mountainous districts.
Growing in loose patches, a few
inches broad, or scattered amongst
mosses. Stems i to 2 inches long,
erect, thread-like, flexuose, simple,
or innovant towards the apex. Leaves
close and subimbricate, widely ovate,
approaching cordate, spreading or
erect and secund, half embracing at
the base and decurrent, at the apex
with a rather deep obtuse notch
(fig- 139)- Margins recurved. Colour
brownish green.
139.
G en u s 26. MYLIA, Gray.
Involucre small-leaved, leaves connate at
the base. Perianth terminal, elongated, c yl indrical,
longer than the calyptra, mouth compressed,
two-lipped. Cap sule four-valved,
coriaceous. Elaters double, naked, deciduous.
— Gray A r r . /., 693 (1821 ) .
Dioicous. Perianth terminal, laterally compressed
from a subterete base, contracted at the apex, at
length bilabiate, denticulate ; involucral bracts two,
spieading from a clasping base. Leaves succubous,
bifariously imbricated, alternate, circular, or ovate,
and pointed. Amphigastria subulate. Elaters bi-’
spiral, deciduous.
Plants forming dense tufts in Alpine bogs, or
clinging to_ the stems of Sphagnum. The com-
pre’ssed perianth of Plagiochila is combined with
general habit of Jungermannia.