THE FERN WORLD OF AUSTRALIA. 
31 
tKe lobes not dentate. Sori lateral or terminating the smaller lobes. 
Indusiiim orbicular or rather broader than long, about half line 
diameter, deeply divided into entire valves. Found in cool damp 
places in N. S. Wales and Victoria. Abundant in Tasmania. 
H. javanicum, Spreng. Rhizome glabrous creeping. Fronds 
ovate or lanceolate in outline three to eight inches long, twice or 
thrice (bi-tripinnatifid) the rhachis winged, with a crisped wing 
which is continued down the stipes ; segments and lobes linear- 
oblong, obtuse, not dentate. Sori on short lateral lobes, Indusium 
ovate, about half inch long, divided nearly to the base into entire 
valves. Found on the Coast Range, Rocldngham Bay, in Queens- 
land, Bkie Mountains, N. S. Wales, also in a few places in Victoria, 
but most plentiful in Tasmania. 
H minimum, A. Rich. Rhizome filiform, matted. Fronds on 
short capillary stipes, orate in outline, quarter to half-inch long, 
deeply divided into five to eight simple or bifid-segments, slightly 
denticulate. Sori usually one only to each frond, terminating the 
main axis. Indusium nearly one line broad, deeply divided into 
two rounded denticulate open valyes. On trees, top of Mount 
Gower, Lord Howe's Island, N. S. Wales. 
H. pumilum, C. Moore. Rhizome filiform, forming broad dense 
matted patches. Fronds ovate rhomboidal in outline, half to one 
inch long and nearly as broad, deeply pinnatifid, the pinnge close 
together, deeply lobed, the lobes few, broadly linear, with more or 
less denticulate margins. Sori few, terminating short lobes on the 
main axis. Indusium about a fine in diameter deeply divided into 
denticulate or rarely entire valves. Found in a few parts of 
New South Wales. 
H. tunbridgense, Sm. Rhizome filiform, much branched and 
densely matted forming moss-like patches. Fronds mmierous on 
capillary stipites lanceolate in outline, pinnate one to three inches 
long ; pinnae deeply divided into three to eight linear lobes minutely 
denticulate on the margin. Sori sessile or on a very short lobe, 
solitary at the base of the pinn« on their upper margin. Indusium 
ovate or orbicular, about one line diameter, divided to much below 
the middle into more or less denticulate valves. Found on Mount 
Lindsey, Queensland, and many parts of N. S. Wales, Victoria 
and Tasmania. 
H. multifidum, Swartz. Rhizome creeping matted. Fronds on 
filiform stipites, rhomboidal in outline, bi-tripinnatifid four inches 
or more long, the upper segments confluent with the winged rhachis, 
the lower pinnae distinct ; lobes linear, bordered by minute teeth. 
Sori usually near the base of the primary or secondary pinnae on the 
upper' margin as in the last species from which this differs in its com- 
pound fronds and in the valves of the indusia being usually entire. 
Australian habitat ; on stems of trees Mount Gower, Lord Howe's 
Island, N. S. Wales. 
Tribe V. Oyathe^. — Trunk arborescent, at least in the Aus- 
tralian species. Fronds large, circinate in vernation, twice o]- thrice 
