All seven species of Cyathea tree ferns native to New Zealand are listed on Appendix II of the Convention on International Trade of Endangered Species of Wild Fauna and Flora (CITES) as part of a global listing of all Cyathea species. CITES and many New Zealand botanists (e.g., de Lange et al. 2018) have retained them all in the genus Cyathea, but some authorities (e.g. the New Zealand Plant Conservation Network website: Flora search results - New Zealand Plant Conservation Network (nzpcn.org.nz)) have recently re-classified some species of Cyathea tree ferns as belonging to the genera Alsophila or Sphaeropteris. Even if these new genera names become adopted widely, the species will still be covered by the original Cyathea spp. listing.

The seven native species and their synonyms, their common names, and their New Zealand threat classification (de Lange et al. 2018) are:

• Cyathea (Alsophila) colensoi, rough/ mountain tree fern (Not Threatened)
• Cyathea (Alsophila) cunninghamii, punui, gully tree fern, (Not Threatened)
• Cyathea dealbata (Alsophila tricolor), kaponga, kātote, ponga, punga, silver fern (Not Threatened)
• Cyathea (Alsophila) kermadecensis, Kermadec tree fern (At Risk, Naturally Uncommon)
• Cyathea (Sphaeropteris) medullaris, mamaku, black tree fern (Not Threatened)
• Cyathea (Alsophila) milnei, Milne’s tree fern (At Risk, Naturally Uncommon)
• Cyathea (Alsophila) smithii, katote, soft/ Smith’s tree fern (Not Threatened)