Cyathea kermadecensis W.R.B.Oliv.

Trunk to 20 m tall in the wild but much shorter in cultivation, fronds soon shed leaving clean trunk. Fronds to 3-4 m long, divided 2-3 times. Ultimate segments 8-9 mm long, entire or with wavy edges. Stalks and all axes deeply grooved above. Sori 5-6 mm wide.

Needs shelter and warmth.

NZ (Sunday Is).

Narrow clean trunk; deeply grooved axes; no star-shaped hairs on blade lower surface; cf. C. cunninghamii.

Source: Spencer, R. (1995). Cyatheaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 1, Ferns, conifers & their allies. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Polypodiopsida
order     Cyatheales
family      Cyatheaceae
genus       Cyathea Sm.