Ser. RuoposPERMES. Fam. Rhodymentacea. 
Piate CCXCV. 
RHODYMENIA CUNEATA, Zar. 
Gen. Cuar. Frond flat, membranous, dichotomous or palmate, composed 
of two strata of cells; the medullary stratum of oblong, polygonal, 
larger cells; the cortical of minute, vertically seriated cellules. 
Fructification : 1, sessile, hemispherical, thick-walled conceptactes, at 
length opening by a terminal pore, containing densely-packed spori- 
ferous filaments issuing from a basal placenta, and surrounded by a 
gelatinous pellicle; 2, cruciate or tripartite te¢raspores, either scattered 
over the frond, collected in sori, or immersed in terminal, shield-like 
nemathecia.—Ruopymenta (Girev.), from podeos, red, and vunv, a 
membrane. 
Frons plana, membranacea, dichotoma v. palmata, stratis duobus composita ; 
strato medullari ex cellulis majusculis oblongis polyhedris, corticali cellulis 
minimis coloratis pluriserialibus conflata. Fruct.: 1, cystocarpia sessilia, 
hemispherica, intra pericarpium crassum demum carpostomio apertum fila 
sporifera densissime aggregata, e placenta basali emissa, pelliculd gelatinoso- 
cellulosé velata foventia ; 2, tetraspore cruciatim v. triangule divise, nune 
sparse, nune in soros subdefinitos collecte v. in nemathecus terminalibus im- 
mers. 
RuopyMentA cvneata ; stipes short, soon expanding into the base of the 
frond; frond broadly cuneate, subpalmatifid, pale-red, membranous ; 
the margin entire and flat; cystocarps very numerous, scattered over 
the whole surface of the frond. 
R. cuneata; stipite brevi mox in basi frondis desinente, fronde lato-cuneata sub- 
I > a 
palnatifida, dilute rubra membranacea, margine simplici, cystocarpiis nume- 
rosissimis per totam frondem sparsis. 
RHODYMENIA cuneata, Harv. in Fl. Tasm. v. 2. p. 319. 
Has. East coast of Tasmania, R. Guan. 
GeoGcr. Distr. Tasmania. 
Derscr. Root a small disc. Stipes slender, scarcely thicker than hog’s-bristle: 
terete, ¢-3 inch long, passing into the cuneate base of the frond. Frond 
4—6 inches long, and as. much in expansion, broadly cuneate, irregularly 
cleft or semi-cleft into two or more principal segments, which are again 
often bifid or lacerate, each segment from 1-2 inches wide, oblong or 
cuneate, the apices emarginate or shortly bifid and subacute. The margin 
is quite entire and flat, or slightly undulating. Cystocarps (on fertile fronds) 
extremely numerous, scattered over the whole surface, very prominent to 
