HA
hi
'ií;:
; I
In moist and wet situations. (Fr. July.)
Fronds much imbricated, procumbent, only erect
when growing in water, variable insize,rarely simple,
usually once or twice dichotomous, i to 4 or 5
186.
inches long ; laciniæ mostly short,
prominent dark midrib beneath, whence
spring numerous silky radicles. Colour
uniform dull green, between fleshy
and membranaceous. Dioicous. Male
receptacle greenish, pedunculate,
springing from the base of a sinus, at
the end of a frond (fig. 186). Receptacle,
flat on the top, horizontal, papillose,
fleshy, thin at the margin, cut into
about eight short rounded lobes.
Anthers equal in number to the papil-
læ on the surface, and imbedded in it,
opening by an orifice through the
^ On the underside numerous imbricated
scales, radiating so as to correspond with the marginal
lobe. Female receptacle pedunculate, hemi-
pherical, deeply divided to the
base into eight to ten linear decurved
rays, covering as many
involucres (fig. 187), which are
united at the base, and mixed
with minute chaffy scales. Involucres
oblong, open at the end
and torn, enclosing an ovate
quadrifid perianth. Calyptra
obovate. Capsule ovate, pale
greenish brown, protruded a
little beyond the calyx, opening
into about eight short segment.s..
Elaters bispiral. Cemmæ propapillæ.
duced in cup-shaped processes on the surface of the
frond, and on the midrib.
G e n u s 4 2 . LUNULARIA, Mù/i.
Male receptacle sessile. Margin membranous,
elevated. Female receptacle divided into
cells, the apex of which open b y a longitudinal
fissure. C a ly x none. Capsule quadr ivalvular,
exserted.
Lunularia vulgaris, Mich.
Fronds dens e ly clustered, i to 2 inches in
length, of a light shining green, divided into
three or four lobes with the margins waved.
Male receptacle sessile. Female receptacle
stalked, wi th four linear lobes. Capsules
elongated, blackish, opening with four valves.
Marchantía Icevis, Hook. Eng. FI. V., p. 103.
L unularia vulgaris, Mich. Nov. Gen. t. 4 ;
T a y l . Linn. Trans . X V I I . , 308 ; Co o ke Hep.
f. 185 ; Carr, and Pears. Exs. No. 148.
On road-sides or banks.
Dioicous. Frond furcate, innovant at the apex,
radiculose beneath from the effused median costa.
Dorsal epidermis distinctly areolate and porose,
walls of the cells thick. A p e x of the common
peduncle incrassated, involúcrate at the base, membranaceous
involucre polyphyllous. Partial invo