Alsophila glabra

Alsophila glabra, synonym Cyathea glabra,[1] is a species of tree fern native to Borneo, western Java, Sumatra and the Malay Peninsula, where it grows in lowland swamp forest and montane forest at an elevation of up to 1500 m. The trunk of this plant is erect and 2–4 m tall. Fronds are bi- or tripinnate and 1–2 m in length. Characteristically of this species, the lowest pinnae may be significantly reduced. The stipe is very dark and bears basal scales. These scales are dark, glossy and have a paler margin and fragile edges. Sori are produced in groups of one to three on fertile pinnule veins. They lack indusia.[2]

Alsophila glabra
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Class: Polypodiopsida
Order: Cyatheales
Family: Cyatheaceae
Genus: Alsophila
Species:
A. glabra
Binomial name
Alsophila glabra
(Blume) Hook.[1]
Synonyms[1]
  • Alsophila dubia Bedd.
  • Alsophila reducta Alderw.
  • Alsophila vexans Ces.
  • Cyathea dubia (Bedd.) Copel.
  • Cyathea glabra (Blume) Copel.
  • Cyathea reducta Domin
  • Cyathea venulosa Wall.
  • Cyathea vexans (Ces.) C.Chr.
  • Gymnosphaera glabra Blume
  • Gymnosphaera vexans (Ces.) Copel.

Large and Braggins (2004) note that A. glabra is very similar to Alsophila gigantea and appears to form part of a complex that also includes Alsophila podophylla and Alsophila subdubia. Further study is needed to determine the nature of the relationship between these taxa.[2]

References
  1. Hassler, Michael & Schmitt, Bernd (June 2019). "Alsophila glabra". Checklist of Ferns and Lycophytes of the World (version 8.02). Retrieved 2019-09-15.
  2. Large, Mark F. & Braggins, John E. (2004). Tree Ferns. Timber Press. pp. 136–137. ISBN 978-0-88192-630-9.


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