between fleshy and membranaceous, thinnest at the
margin, which is waved and obtuselylobed, the lobes
often incurved (fig. 177). Throughout the centre
of the frond, and its divisions, runs an evident and
broad nerve, most prominent on the underside, whole
plant pale green. Closely adpressed to the nerve on
the underside are scattered small, oval scales
resembling stipules, which are unequally dentate.
Calyx oblong-lanceolate, and acuminate, inflated,
semi-transparent. Capsule ovately globose, whitish
at the base, the rest pale- olive brown. Elaters bi-
.spiral.
-Elaters monospiral,Sect. B.- acute at each
extremity.
Sub-tribe VIII. METZGERIEÆ.
Plants frondose, pinnately or dichotomously
branched ; laciniæ linear ; reproduc t ive or gans
o f either sex in two rows on the costa
in abbreviated branches ; pistillidia two to
twenty, without styles. Per ianth none. C a ly p tra
large, clavate, fleshy, papillose, or hairy.
Capsule four-valved. Elaters fixed, mixed
with others free, r is ing in four tufts on the
open capsule ; monospiral, attenuated to each
end.
G e n u s 39. METZGERIA, Raddi.
Involucre scale-like, of one leaf, bilobate.
Perianth none. C a lyp t ra exserted, echinate.
Capsule four-valved, coriaceous, v a lv e s bearing
elaters at their apex. Elaters terminal,
solitary, naked, persistent .— Raddi. Jung.
Etrusc., p. 45, 1820.
Plants without leaves, frondose, fronds costate.
Metzg-eria furcata, Linn.
Frond creeping, linear, dichotomous, mar gin
ciliate, nerve villose.
Jungermannia Jurcata, Linn. Sp. 1 6 0 2 ;
Hook. Br. Jung. t. 5 5 , 5 6 ; Eng. Bot.
t. 1 6 3 2 . Metzgeria Jurcata, Dum. Rev. Jung,
p. 2 6 ; Co t t . and Rab. Exs. No. 3 1 , 1 1 9 , 1 2 0 ,
179) 2 7 4 , 3 5 7 ; Carr, and Pears. Exs. 7 2 , 7 3 ;
C o o k e Hep. figs. 1 7 9 , 1 8 0 , 1 8 1 , 1 8 2 .
On trunks and on the ground. (Fr. Spring.)
var. 7 ceruginosa. Hook. Fronds broader,
dilated at the apex, quite ohtMse.— Jung.
Jruticulosa, Eng. Bot. t. 2 5 1 4 .
Growing in dense patches, closely pressed to the
surface. Fronds ^ to 4 inch long, creeping, horizontal,
overlying each other in an imbricated manner,
linear, thin, membranaceous, slightly waved, margins
entire, always branched in a furcate manner,
with the branches forked for the most part at the
extremity, apices obtuse, upper surface smooth,
margin and under surface beset with stout white
hairs. Colour pale and pleasant green. Throughout
the frond and its branches runs a distinct central