tree ferntree fern
any of various tropical, treelike ferns (esp. genera Cyathea, Alsophila, and Hemitelia) with an elongated, woody trunk bearing fronds at the top
Any of various large tropical ferns, especially of the families Cyatheaceae and Dicksoniaceae, having a woody trunklike stem and a terminal crown of large, pinnately divided fronds.
(plural tree ferns)