792 CXLVII. FILICES. [Asyleniuim. 
broad, shortly dentate or some of the larger ones pinnatifid or almost 
innate. Primary veins proceeding oblique y from the midrib to the 
teeth orlobes, with secondary obliquely pinnate veinlets often anasto- 
mosing. Sori linear, on pepe sa} vesniony with the single or 
EE Ailia Bay, W. Hill, Dallachy ; Daintree River, Fitzalan. 
Also in tropical Africa, the Malayan Archipelago and Pacific Islands. 
31. CYSTOPTERIS, Bernh. 
oo ferns, with twice or thrice pinnate fronds, with small dentate 
ents. Veins forked or pinnate, with free venules. Sori sma all, 
SAU. attached to the concave base of an ovate indusium fixed on a 
-venule at a distance from the margin. 
small genus spread over the temperate or mountain regions of both the northern 
ad southern ry uei the only Australian species the no common. in the 
general area of the g It is gen erally placed — Davallia on account : the 
— es atthe position of the sori and the texture and od 
nce of ity gei in which t spore-cases 
an e frequently pen in que to the A uc though never holly so as mM 
Cystopteris 
fragilis, Bernh. ; Hook. Spec. Filic. i. 197, Brit. Ferns, t. 93, 
sy. Pili 103.—Rhizome creeping, scaly. Fronds usually 6 to 9 in. 
on a slender stipes without scales. Segments ovate or lanceolate, 
piunatifid or dentate, with obtuse lobes or teeth. Sori several on eac 
segment, at first enclosed in the indusium which is small and thin in 
the rede AES and soon ow under the enlarged 
globular sori. —Hook. f. Fl. Tasm. ii. 136, t. Bedd. Ferns Brit. Ind. 
1.91 (the pens in all the figures be er he in any Tasman: 
specimens) ; C. tasmanica, Hook. ‘Spee. Filic. i. 199, le. Pl. t. 959. 
Tasmania. Moist rocks, Mount Olympus and Lake St. Clair, Gunn. 
32. ASPIDIUM, Swartz. 
Rhizome thick and shortly erect or creeping. Fronds once twice oF 
thrice pinnate, rarely in species not Australian, simple. Sori orbicular, 
ventosa gee variously dispersed over the under suriace. Iudusium 
orbicular, covering = sorus when young, nttahed by the centre Of 
by a point or in a sinus on one si e, that hen opened all 
mund by UE growth of the spore-cases it pow an or more 
