("Sesbania
grandiflora," Baron Mueller says, "North-Western Australia; to the
verge of the tropics; Indian Archipelago; called in Australia the
corkwood tree; valuable for various utilitarian purposes. The
red-flowered variety is grandly ornamented. Dr. Roxburgh recommends
the leaves and young pods as an exquisite spinach; the plant is shy of
frost.") The wood is soft, and light in weight and colour. It is by no
means a handsome tree. It grows about twenty feet high. Generally two
or three are huddled together, as though growing from one stem. Those
I saw were nearly all dead. They grow in the little water channels.
The ants here, as in nearly the whole of Tropical Australia, build
nests from four to six feet high--in some other parts I have known
them twenty--to escape, I suppose, from the torrents of rain that at
times fall in these regions: the height also protects their eggs and
stores from the fires the natives continually keep burning. This
burning, perhaps, accounts for the conspicuous absence of insects and
reptiles. One night, however, I certainly saw glowworms. These I have
only seen in one other region in Australia--near Geelong, in Victoria.
A tree called the native poplar (Codonocarpus cotinifolius) is also
found growing in the scrubs and water-channels of this part of the
country.
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