Cyathea alderwereltii

Cyathea alderwereltii
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Pteridopsida
Order:	Cyatheales
Family:	Cyatheaceae
Genus:	Cyathea
Subgenus:	Cyathea
Section:	Alsophila
Species:	C. alderwereltii
Binomial name
Cyathea alderwereltii Copeland, 1909
Synonyms
Alsophila alderwereltii (Copeland) Tryon, 1970 Alsophila spinifera Alderwerelt van Rosenburgh, 1922 Cyathea spinifera (Alderwerelt van Rosenburgh) Domin, 1930 Cyathea horridipes Domin, 1929 Hemitelia sumatrana Alderwerelt van Rosenburgh

Cyathea alderwereltii is a species of tree fern endemic to Mount Sago in central Sumatra, where it is nevertheless abundant and grows in forest at an altitude of 1000-1500 m. It has an erect trunch which may be 4 m tall or more. Fronds are bi- or tripinnate and 1-2 m long. The stipe of this species is spiny at the base and covered with scattered scales that are dark brown, glossy, and have a narrow paler margin. Sori are produced near the fertile pinnule midvein and are covered by small, brown scale-like indusia.

C. alderwereltii is named after Cornelis Rogier Willem Carel van Alderwerelt van Rosenburgh (1863-1936), a Dutch pteridologist who worked extensively in the Sunda region.

References

• Braggins, John E. & Large, Mark F. 2004. Tree Ferns. Timber Press, Inc., pp. 91-92. ISBN 0-88192-630-2
• The International Plant Names Index: Cyathea alderwereltii