Tree-fern

tree fern

noun
any of various ferns, mostly tropical and chiefly of the family Cyatheaceae, that attain the size of trees, sending up a straight trunklike stem with foliage at the summit.

Origin:
1840–50

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World English Dictionary
tree fern
 
n
any of numerous large tropical ferns, mainly of the family Cyatheaceae, having a trunklike stem bearing fronds at the top

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