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Definition of Tree fern
1. Noun. 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.
Generic synonyms: Fern
Specialized synonyms: Black Tree Fern, Cyathea Medullaris, Sago Fern, Silver Tree Fern, Dicksonia Antarctica, Soft Tree Fern, Cibotium Barometz, Scythian Lamb, Thyrsopteris, Thyrsopteris Elegans, Angiopteris, Angiopteris Evecta, Giant Fern
Specialized synonyms: Black Tree Fern, Cyathea Medullaris, Sago Fern, Silver Tree Fern, Dicksonia Antarctica, Soft Tree Fern, Cibotium Barometz, Scythian Lamb, Thyrsopteris, Thyrsopteris Elegans, Angiopteris, Angiopteris Evecta, Giant Fern