May, 1943 
43 
The Queensland Naturalist 
those of C. australis. Stipes clothed at base with very dis- 
tinctive dark brown, narrow, rigid scales or bristles. Axes 
of fronds smooth, pale underneath but densely covered with 
short brown hairs above. Texture of frond thinly papery, 
green above, paler on under surface. Sori small. 
Recorded from Rockingham Bay, Cardwell Range, 
between Cairns and Herberton, and Mt. Spurgeon. 
4. C. Leichhardtiana , Prickly Tree-fern. 
A common species in Southern Queensland, but very 
rare in the far north. It is easily recognised by its dark 
slender trunk up to 20ft. high and thin, hard, dark, 
prickly stalks and axes. Fronds large, primary pinnae 
2ft. or more long and eight inches wide ; secondary pinnae 
similar to those of C. australis and C. excelsa , but the 
segments are narrower and more distinctly toothed, and 
the lower ones are more frequently free and shortly stalk- 
ed. The fronds are a darker green than those of C. 
australis and C. Brownii. 
This is the commonest species in our south- 
ern rain-forests. It is found on mountain slopes and on 
creek banks, but seems to grow much taller in the higher 
situations. 
5. C. Rebeccae, Rebecca’s Tree-fern. 
Trunk slender, up to 12ft. high and about 2-4 inches in 
diameter. The stalk-bases of old fronds are persistent on 
the trunk. Crown very loose, consisting of about eight 
tions of the State both in lowland and highland localities, 
fronds. Stalks and axes dark, slender, rather rough, 
covered on the upper side with long narrow scales. Fronds 
dark green, 3-8ft. long and up to 3^ft. broad, bipinnate; 
pinnae up to 2ft, long and about 5 inches broad ; secondary 
pinnae 2-3 inches long, 3/8 inch broad, shortly stalked, 
broad at the base tapering upwards, the midrib scurfy 
underneath ; margins from almost entire to bluntly toothed 
or incised less than half-way to the midrib. Sori (spore- 
masses) large, globular, in two irregular rows on each 
side between the midrib and margin. 
6. C. Bailey ana , Wig Tree-fern. Fig. 2. 
A very rare species so far recorded only from Mts. 
Spurgeon and Bellenden-Ker and from near Ravenshoe in 
