Cyathea kermadecensis

Cyathea kermadecensis
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Pteridopsida
Order:	Cyatheales
Family:	Cyatheaceae
Genus:	Cyathea
Subgenus:	Cyathea
Section:	Alsophila
Species:	C. kermadecensis
Binomial name
Cyathea kermadecensis W. R. B. Oliver, 1910
Synonyms
Alsophila kermadecensis (W. R. B. Oliver) Tryon, 1970

Cyathea kermadecensis is a species of tree fern endemic to Raoul Island in the Kermadec Islands, where it is locally common in damp, and sometimes drier, forest and scrub. The trunk of this plant is erect, slender, and up to 20 m tall. It is often covered with scars of old stipe-bases. Fronds are tripinnate and up to 4 m in length. The rachis and stipe are both brown in colouration and bear basal scales that are brown, glossy, and often twisted. Sori are borne on either side of the pinnule midvein. They are covered by hood-like indusia.

Braggins and Large (2004) note that C. kermadecensis is similar to Cyathea cunninghamii.

C. kermadecensis should be cultivated in good humus and provided shade as well as shelter from the wind. Nevertheless, it is a hardy species that will survive full sun and slight frost.

The specific epithet kermadecensis refers to the Kermadec Islands. C. kermadecensis is one of two tree fern species endemic to the islands, the other being Cyathea milnei.

References

• Braggins, John E. & Large, Mark F. 2004. Tree Ferns. Timber Press, Inc., p. 150. ISBN 0-88192-630-2
• The International Plant Names Index: Cyathea kermadecensis