Cyathea medullaris(redirected from Alsophila extensa)
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|Noun||1.||Cyathea medullaris - a showy tree fern of New Zealand and Australia having a crown of pinnated fronds with whitish undersides|
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