-fronds broad, repeatedly forked, the upper portion of the 
A | CHARACTERS OF TRIBES AND GENERA. 
less contracted. Veins uniform, reticulated, immersed, 
areolae narrow, oblique. Receptacles marginal, immersed 
in an indusioid groove, forming a continuous linear sorus. 
Type. Schizoloma cordata, Gaud. 
Illust. Fée Gen. Fil, t. 8, B, fig. 1; Hook. Sp. Fil. 1, 
t. 66, A; Moore Ind. Fil., p. 17, B. 
Oss.—This genus is founded on a very rare Fern, hitherto 
only found in the Moluccas and New Guinea. On account 
of the sporangia being seated in a marginal groove, analo- 
gous to that of the tribe Lindscec, consequently it has been 
by authors placed in that alliance; but it differs entirely 
in habit and texture, and in having no membraneous 
indusium. Fée has very properly characterised it as a 
distinct genus, and places it in alliance with Tænitis, with 
which it has some points of affinity in texture and venation, 
but it differs in the vernation being articulate, that of 
Tenitis being adherent. 
Sp. S. cordata, Gaud. ín Frecen. Voy., t., 6, 18. 
Tribe 5—PLATYCERIEA (Plate 5). 
Fronds dimorphous, sterile depressed, conchiform, fertile 
segments or lobes densely sporangiferous (amorphus). 
39. Puatycertum, Desv. (1897.) 
Hook. Sp. Fil.; Acrostichum sp., auct. 
: Vernation articulate. Swrculum short, scarcely evident. 
x Sterile fronds sessile, oblique reniform, round or elongated, 
. depressed, the new successively overlapping the old, form- 
. ing an epiphytal spongy convex mass, often 1 to 8 feet in 
diameter. Fertile fronds stipitate, rising from the sinus « 
