{{Taxobox
| color = lightgreen
| name = Mamaku
| image = Cyathea_medullaris.JPG
| image_width = 240px
| regnum = [[Plant]]ae
| divisio = [[Pteridophyta]]
| ordo = [[Cyatheales]]
| familia = [[Cyatheaceae]]
| genus = ''[[Cyathea]]''
| species = '''''C. medullaris'''''
| binomial = ''Cyathea medullaris''
| binomial_authority = (G. Forster) Swartz, 1801
| synonyms =
*''Polypodium medullare'' <small>G. Forster, 1786</small>
*''Sphaeropteris medullaris'' <small>(G. Forster) Bernhardi, 1801</small>
*''Cyathea affinis'' <small>W. J. Hooker & Baker, 1874 (''non [[Cyathea affinis]]'' (J. R. Forster) Swartz, 1801, ''non [[Cyathea affinis]]'' M. Martens & Galeotti, 1842, ''non Cyathea affinis'' Brackenridge, 1854; ''quae [[Cyathea propinqua]]'')</small>
*''Alsophila extensa'' <small>Desvald, 1827 (''non Alsophila extensa'' Blume, 1828; ''quae [[Cyathea raciborskii]]'')</small>
*''Alsophila lunulata'' <small>(G. Forster, 1786) R. Brown, 1827 (''non Alsophila lunulata'' Blume, 1828; ''quae [[Cyathea junghuhniana]]'') 
</small>
}}
Ko te ''Mamaku'' he [[kaponga]] tino rahi, he mangu te tīwai me ngā tākaka. Ko te ingoa huaota he ''Cyathea medullaris''. He ingoa [[reo Māori]] anō tō te rākau nei, arā he ''Katātā'', he ''Kōrau''. Ko te ingoa [[reo Pākehā]] he ''Black treefern''. 
<gallery>
Image:Treeferngroup.JPG
Image:fiddlehead black tree fern.jpg
Image:Closeup fiddlehead black tree fern.jpg
</gallery>

==Tohutoro==
*Metcalf, Laurie, 2002. ''A Photographic Guide to Trees of New Zealand''. Tāmaki-makau-rau: New Holland.
*Salmon, J.T., 1986. ''The Native Trees of New Zealand''. Te Whanga-nui-a-Tara: Heinneman Reed.

{{Rākau o Aotearoa}}
{{Maramara}}

[[Category:Rākau whakaruruhau o Aotearoa]]

[[en:Cyathea medullaris]]
[[es:Cyathea medullaris]]
[[pt:Cyathea medullaris]]