134 FOREST CULTURE AND 
add. The circular Asplenium nidus, or great Nest 
Fern, with fronds often six feet long, extends to the 
eastern part of Gipps Land, but the equally grand Stag- 
horn Fern (Platycerium alcicorne and P. grande ) 
seemingly cease to advance south of Illawarra, while 
in northern Queeensland Angiopteris evecta count 
among the most gorgeous, and two slender Alsophilze 
among the most graceful forms. The transhipment 
of all these Ferns offers lucrative inducements to trad- 
ers with foreign countries. Epiphytal Orchids, so 
much in horticultural request, are less numerous in 
these jungle-tracts than might have been anticipated, 
those discovered not yet exceeding thirty in number. 
Their isolated outposts advance in one representative 
species—the Sarcochilus Gunnii—to Tasmania and the 
vicinity of Cape Otway, and in another—Cymbidium 
canaliculatum—toward Central Australia. The com- 
parative scantiness of these epiphytes contrasts as 
- strangely with the Indian Orchid-vegetation as with 
the exuberance of the lovely terrestrial co-ordinal 
plants throughout most parts of extra-tropical Austra- 
lia, from whence one hundred and twenty well-defined 
species are known. Still more remarkable is the al- 
most total absence of Orchids, both terrestrial and epi- 
phytal, from north and north-west Australia, an ab- 
sence for which in the central parts of the continent 
aridity sufficiently accounts, but for which we have 
no other explanation in the north than that the spe- 
cies have as yet there effected but a limited migra- 
tion. To the jungles and cedar-brushes—the latter 
so named because they yield that furniture-wood so 
famed as the Red Cedar (Cedrela taona, a tree identi- 
cal as a species with the Indian plant, though slight- 
