THE FERN WORLD OF AUSTRALIA. 
69 
qiiercifoliiim and P.. rigiduliim. Fronds two to three feet high, 
pinnate.. Pinnae on rather long somewhat flattened petiohiles, the 
margin much incised, cmieate at the base, not articulate npon the 
rhachis, more membranous than in the typical form and although 
having the same tomentum on the early growth this is soon lost 
and the whole plant assumes a beautiful glossy green ; no sori has 
been noticed on any of the fronds of this form, but should it he 
produced on these nonarticulate fronds then P. rigidulum will fall to 
a form of P. quercifolium. Found in a small scrub at Oxley, 
Brisbane River, by J. G. Vidgen, Esq., Hon. Sec. Queensland 
Acclimatisation .Society, in 1875. As a scenic plant this will be 
found eminently useful. 
P. quercifolium, Linn. Rhizome broad, creeping. Fronds of 
two kinds, the small sessile ones similar to the last species, the 
large ones two to three feet high, deeply pinnatifid ; segments 
lanceolate, six to nine inches long, three-quarter to one and a half 
inch broad, decurreht on the rhachis and usually confluent into a 
broad wing but sometimes interrupted between the lower segments, 
thin but usually rigid, very prominently and copiously reticulated, 
the free veinlets within the areoles small and rare. Sori small, 
scattered, few or numerous. Usually a coast fern, found from 
Rockhampton to Cape York; also' in N. Australia. 
P. irioides, Poir. Rhizome stout, shortly creeping. Fronds 
entire or lobed, one to three feet long, one to three inches broad, 
coriaceous, contracted into a short stipes. Primary parallel veins 
distant and usually conspicuous \^ith copious fine reticulations 
between them, the free veinlets in the areoles numerous. Sori often 
small and very numerous, covering the whole under surface of the 
upper part of the frond but quite distinct from each other. Found 
along the coast from Moreton Bay to Cape York, lining the edge 
of rivers and swamps. 
XXXIV. — NoTHOL^NA, R. Brown. 
Rhizome tufted. Fronds usually small, once, twice or three' 
times pinnate with small lobed segments. Veinlets fo;-ked from a 
central nerve or from the base of the segment. Sori small at the 
ends of the veinlets, almost contiguous forming an apparently 
continuous line within the unaltered margin, which is, however, more 
or less curved over them in a young state. * With regard to the 
Australian species it might have been well for them to have been 
placed in Cheilanthes. Name derived from the Greek nothos, 
spurious ; and chlaina, a covering. This latter word is contracted in 
several other botanical names to L^ena, in the present it alludes to 
tlie edge of the frond curving over the sori and forming a spurious 
indusium. 
N. pumilio, R. Br. Rhizome short. Fronds tufted, one to 
three inches high, simply pinnate, with a filiform rhachis. Pinnee 
few, ovate or oblong, obtuse, three to five lines long, membranous. 
