72 THE PERN WORLD OF AUSTRALIA. 
extending to the margin frequently but not always, the others 
prominent, flexuose, with anastomosin.o: branches, and from both 
are emitted a few short free branches. This fern is nearly allied to, 
if indeed not really a form of the Indian Grammitis decnrrens, 
Wall. Eockingham and Trinity Bays, and Daintree River. 
XXXVI. — Antrophyum, Kaulf. 
Bhizome shortly creeping. Fronds simple, entire, lanceolate or 
broad, with longitudinal more or less anastomosing veins, bearing 
long linear sori without indusium. Name derived from the Greek 
antron, a cavern, and phyo, to grow. Plants usually found 
growing on the face of damp rocks. 
A reticulatum, Kaulf. Rhizome hairy, shortly creeping. 
Fronds six inches to one foot long, one to two inches wide, 
acuminate, tapering to a short stipes, glabrous firm, the veins 
prominent on the upper surface forming long narrow areoles. 
Sori all longitudinal, narrow-linear but varying much in number 
and length. On the damp rocks in the gullies of the ranges of 
Northern Queensland. 
XXXVII. — AcROSTiCHUM, Linn. 
Rhizome creeping sometimes to a great length or short, and 
erect. Fronds undivided or pinnate, variously veined. Sori con- 
fluent, covering the under surface of the fertile frond or pinnse, 
which are usually smaller or narrower than the barren ones. 
Derivation doubtful. 
A. conforme, Swaitz. Deer's tongue. Rhizome creeping, scaly. 
Fronds simple, lanceolate, coriaceous, from a few inches to above 
one foot long, half to one inch broad, acute or acuminate, tapering 
into a stipes sometimes narrowly winged almost to the base. Veins 
parallel, simple or forked, not close, and concealed in the texture of 
the frond ; the fertile fronds are usually smaller and more obtuse. 
Rockingham Bay, Queensland. 
A scan dens, J. Sm. Rhizome furrowed, woolly, scaleless, creeping 
in swamps and climbing up the trunks of trees, and often rooting. 
Fronds one to three feet long, simply pinnate. Pinnae of the 
barren fronds broadly lanceolate, acuminate, rounded or cuneate at 
the base and shortly petiolulate, three to eight inches long, three- 
quarter to one and a half inches broad, entire or slightly dentate, 
coriaceous, smooth and shining. Veins very numerous, fine and 
closely parallel. Pinn^ of the fertile fronds long and very narrow- 
linear, sometimes almost terete, sometimes flat and two lines broad. 
Port Darwin, South Australia, and in most of the coast swamps of 
tropical Queensland. 
A. sorbifolium, Linn. Var. leptocarpum. Rhizome creeping, 
climbing up the trunks of trees to a great height. Frond pinnate, 
one to three, or more feet long. Pinnas of the barren fronds lanceo- 
