Cyathea glaberrima is a species of tree fern

Cyatheales

The order Cyatheales is a taxonomic division of the fern subclass, Cyatheatae, which includes the tree ferns. No clear morphological features characterize all of the Cyatheales, but DNA sequence data indicates that the order is monophyletic. Some species in the Cyatheales have tree-like growth...

 endemic

Endemic (ecology)

Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, all species of lemur are endemic to the...

 to the D'Entrecasteaux Islands

D'Entrecasteaux Islands

D'Entrecasteaux Islands are situated near the eastern tip of New Guinea in the Solomon Sea in Milne Bay Province of Papua New Guinea. The group spans a distance of 160 km, has a total land area of approximately 3,100 km² and is separated from the Papua New Guinea mainland by the...

, specifically Fergusson Island

Fergusson Island

Fergusson Island is the largest island of the D'Entrecasteaux Islands, in Papua New Guinea. It has an area of just over 500 square miles , and mostly consists of mountainous regions, covered by rain forests...

 and Goodenough Island

Goodenough Island

Goodenough Island in the Solomon Sea is the westernmost of the three large islands of the D'Entrecasteaux Islands in Milne Bay Province of Papua New Guinea. It lies to the east of mainland New Guinea and south west of the Trobriand Islands.It should not be confused with Goodenough's Island...

, where it grows in mossy forest at an altitude of 900-1400 m. The trunk is erect and usually about 2 m tall. Frond

Frond

The term frond refers to a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group...

s may be bi- or tripinnate, are 1-2 m in length, and form a dense crown. The stipe

Stipe (botany)

In botany, a stipe is a stalk that supports some other structure. The precise meaning is different depending on which taxonomic group is being described....

 is finely warty and bears numerous glossy scale

Scale (zoology)

In most biological nomenclature, a scale is a small rigid plate that grows out of an animal's skin to provide protection. In lepidopteran species, scales are plates on the surface of the insect wing, and provide coloration...

s with fragile edges. Sori

Sorus

A sorus is a cluster of sporangia .In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....

 are produced close to the fertile pinnule midvein. They are protected by small, dark brown indusia that are scale-like in appearance.