tree fern - any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae

Cibotium, genus Cibotium - in some classification systems placed in family Cyatheaceae: ornamental tree ferns with coarse gracefully drooping fronds