Cyathea cooperi Revolvulum is a medium-to-large fast growing tree fern,
to 15 metres (49 ft) in height with a 12-inch (30 cm) thick trunk. The
apex of the trunk and unfurling crosiers are particularly attractive,
covered as they are with conspicuous long, silky, straw colored scales.
The crown is widely spread and the light green fronds may reach a length of 4–6 metres (13–20 ft).