Alsophila australis, synonym Cyathea australis, also known as the rough tree fern, is a species of tree fern native to southeastern Queensland, New South Wales and southern Victoria in Australia, as well as Tasmania and Norfolk Island.
Alsophila australis was described in 1810 by Robert Brown from a specimen collected on King Island in Bass Strait, off the coast of Tasmania. It is the type for the genus Alsophila. The specific epithet australis means 'southern' and refers to this southerly location.Alsophila ...