EN

Cyathea williamsii

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Cyathea williamsii faces severe pressure from deforestation and habitat conversion in its limited range across tropical montane forests. The species is particularly vulnerable due to its slow growth rate and specific microclimate requirements, making recovery from disturbance extremely difficult. Agricultural expansion and logging activities continue to fragment the remaining populations, while climate change threatens to shift suitable habitat zones beyond the species' dispersal capabilities.

Threat summary

Habitat

This tree fern inhabits tropical montane cloud forests and wet mountain slopes, typically occurring in areas with high humidity and consistent moisture. It requires the specific microclimate conditions found in undisturbed forest understories at elevations between 1,000-2,500 meters.

Other threatened species in Cyatheaceae

VU

Cyathea acutidens

Unknown
EN

Cyathea gracilis

Unknown
CR

Cyathea boconensis

Unknown
CR

Alsophila major

Unknown

Frequently asked questions

Why is Cyathea williamsii classified as Endangered?
Cyathea williamsii is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Cyathea williamsii faces severe pressure from deforestation and habitat conversion in its limited range across tropical montane forests. The species is particularly vulnerable due to its slow growth rate and specific microclimate requirements, making recovery from disturbance extremely difficult. Agricultural expansion and logging activities continue to fragment the remaining populations, while climate change threatens to shift suitable habitat zones beyond the species' dispersal capabilities.
Where does Cyathea williamsii live?
Cyathea williamsii occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Cyathea williamsii?
The main threats to Cyathea williamsii are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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