68 
THE FERN WORLD OF AUSTRALIA. 
up the trunks of trees, often to a great height. Fronds most 
various in outline, six inches to one and a half feet long, entire or 
deeply pinnatifid, membranous, segments on pinnatifid frond often 
numerous, narrow lanceolate or linear and often falcate, decurrent 
and confluent to the wing of costa. Veins slightly prominent, 
forming one or two series of rather large oblong areoles, including 
free veinlets. Sori distant, in a single row on each side of costa 
or costules, sub-marginal, the excavated receptacles prominent on 
the upper surface. Enoggera Creek, Maroochie, &c., Queensland ; 
more frequent in N. S. Wales and Victoria. 
P. verruGosum, Wall. Rhizome creeping. Fronds three to 
four feet long, pinnate, glabrous. Pinnas oblong-lanceolate, 
acuminate, obtusely serrulate, equally or unequally cuneate at the 
base, shortly petiolulate or almost sessile, apparently articulate on 
the rhachis, six to eight inches long, half to one inch broad, 
membranous. Venation reticulate between the primary veins, with 
free venules in the areoles. Sori distant in a single row on each 
side of the costule and near to it, the excavated receptacles very 
prominent on the upper surface. Rockingham Bay and Daintree 
River, Queensland; rare. 
P. subauriculatum, Blume. Rhizome horizontal. Fronds one 
to three or sometimes more feet long, glabrous, pinnate. Pinnae 
linear-lanceolate, mostly acuminate, entire or serrulate, three to six 
inches long, three to five lines broad, truncate, rounded or auriculate 
at the base, nearly sessile but somewhat articulate on the rhachis. 
Venation reticulate between the primary veins, with free veinlets in 
the areoles. Sori distant in a single row on each side of the costule 
and near it, the excavated receptacles usually prominent on the 
upper surface. On rocks and trees, -scrubs. Northern Queensland. 
P. rigidulum, Swartz. Rhizome short, thick, creeping, usually 
on rocks or trees. Fronds very various, pinnate, scarcely lobed, or 
deeply pinnatifid, the pinnate form bearing the sori which is never 
found on the sessile, lobed or pinnatifid fronds, rhachis always 
pubescent or densely woolly when young. Pinn^ narrow-lanceolate, 
usually rigid and very prominently and copiously reticulate, three 
to nine inches long, three to nine lines broad, obliquely or equally 
cuneate at the base, often shortly petiolulate, articulate on the 
rhachis. Sori orbicular, distant in a single row on each side of the 
costule and not far from it, the excavated receptacles prominent on 
the upper surface. Each of the tall pinnate fronds closely 
supported by a broad sessile, usually shortly lobed, almost scarious, 
one of about six to twelve inches long, and three or four inches 
wide ; these fronds are sometimes double this size and then deeply 
pinnatifid, very prominently reticulate. A fern most frequently 
met with on rocks throughout Queensland ; also on the Blue 
Mountains, N". S. Wales. 
Var. Vidgeni. There are no fronds with articulate pinnaa in 
this form, their place is taken by a higher developed state of the 
greater number, of the usually sessile scarious fronds peculiar to P. 
