cylindrical, dehiscing to the base in four
valves. Elaters almost a lwa y s with two
spirals, rarely with one spiral, or three to
four, deciduous .— Spruce Hep. Amaz . , p. vi.
Distinct by the polygynous female flowers, pedicel
not at all or scarcely dilated at the apex, never
into a solid apophysis as in Jubuleæ. Capsule producing
spores and elaters on its entire inner surface,
four-valved to the base. Elaters bispiral— rarely
monospiral, deciduous.
S e c t io n A .— Elaters normally bispiral.
Sub-Tribe I. RADULEÆ.
shaped, naked ; elaters two-spired, deciduous.
— Dumort. Ret). Jung., 14.
Radula is apparently separated by a wide interval
from every other genus. ^ It has one unique
character, viz., the attachment of the radicles to the
under lobe of the side leaves, and not to the
under leaves, or the underside of the stem, as
in all other hepatics. In the branches springing
nom the outer base of the leaves it agrees with
Lejeunea, and with no other. In its most essential
features it differs altogether from Lejeunea; e.o-
in the polygynous female flowers, the macrosto-
mous perianth, the stout pedicel, composed of six
to eight concentric layers of alternate cells, and
above all in the very numerous long slender
two-spired deciduous elaters.—
Branches all lateral, infra-axillary ; leaves
incubous, leaflets none ; perianth from the
front almost a lwa y s compressed, mouth broad,
truncate.— Spr.
G e n u s 4 . RADULA, Dumort.
In v o lu c r e indis t inct , c o n fo rm in g to the
le a v e s ; per ichaetial le a v e s b i lo b ed , c o n d u p l i -
cate ; p e r ian th f la t tened at the ba ck, mouth
t runca te , ent ire, not la t e r a l ly sp l i t ; c ap su le
ioLir-valved, semi -p e l lu c id , c e l lula r , funnei-
Radula eomplanata, £., Dum.
Stem creeping, flattened, branched, somewhat
pinnate; leaves auriculate behind, plane
rounded, ent ire ; auricle four times shorter
adpressed, angle rounded. Pe r ianth flat tened’
mouth entire. '
J^mgermannia eomplanata, Linn. S p i con ■
Hook Br. Jung. t. 8 i ; Eng. Bot. t. 2499.’
AnAfrrt eomplanata, Dumort. p. 1 1 2; Got t . and
Kab. Exs, 17, 361 ; Carr, and Pears. Exs. No,
^29) 130Ì Cooke Hep. f. 137,
On trunks. (Fr. April, May.)