tree fern

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tree fern Tree-like fern of the family Cyatheaceae. Tree ferns grow in tropical and sub-tropical regions, particularly moist mountainous areas. Height: 3–25m (10–80ft). There are 600 species. Phylum Filicinophyta; genus Cyathea.

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tree fern, any fern having a treelike trunk. Sometimes other similar primitive plants are also called tree fern, e.g., species of cycad.