Cyathea metteniana

Cyathea metteniana
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Pteridopsida
Order:	Cyatheales
Family:	Cyatheaceae
Genus:	Cyathea
Subgenus:	Cyathea
Section:	Alsophila
Species:	C. metteniana
Binomial name
Cyathea metteniana (Hance) C. Christensen & Tardieu, 1934
Synonyms
Alsophila metteniana Hance, 1868 Alsophila formosana Baker, 1891 Cyathea formosana (Baker) Copeland, 1909 Alsophila formosa (Baker) J. E. Braggins & M. F. Large orth. var., 2004

Cyathea metteniana is a species of tree fern native to the Ryukyu Islands, Japan, and Taiwan, where it grows in wet forest, forest margins, and on hillsides. The trunk of this plant is erect, up to 1 m tall, and 6-10 cm in diameter. C. metteniana has tripinnate fronds that are 1-2.5 m long. The stipe is brown to purple-black in colouration. It is covered in long, broad-based scales that are usually bicoloured (glossy brown with a paler margin). Sori are round, lack indusia, and occur in two rows, one on either side of the pinnule midvein.

The specific epithet metteniana commemorates pteridologist Georg Heinrich Mettenius (1823-1866), who himself named several Cyathea species.

References

• Braggins, John E. & Large, Mark F. 2004. Tree Ferns. Timber Press, Inc., p. 223. ISBN 0-88192-630-2
• The International Plant Names Index: Cyathea metteniana