Fourteen species of Hibiscus and Sida were observed on the intratropical Coasts of Australia, beyond which also, on the opposite shores of the continent, each genus has been remarked.

One species of Bombax with polyandrous flowers, and subspherical obtusely pentagonal capsules, was discovered upon the East Coast, in about latitude 14 degrees South, and on nearly the western extreme of the same parallel, it appeared much more abundant.

Of Sterculia which is scarcely to be found beyond the tropics in other countries, a species exists in New South Wales in the latitude of 34 degrees, on which parallel it is more frequent in the western interior, and in that direction it has been traced to the distance of three hundred miles from the sea-coast.

The genus is also found on the North and North-west Coasts, where the species assume more particularly the habits of their congeners in India.

Among the plants of this family in the Herbarium is a species of Helicteris (as the genus stands at present) which was observed on the North-west Coast bearing fruit, wanting the contortion that characterizes the genus.
This plant, together with three other described species, having straight capsules, may hereafter be separated from that Linnean genus, and constitute a new one of themselves.