CR

Polyscias thailandica

Declining

Overview

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

Polyscias thailandica faces severe threats from rapid deforestation and agricultural expansion across its limited range in Thailand's lowland forests. The species' extremely restricted distribution makes it particularly vulnerable to habitat fragmentation, while logging activities continue to reduce the quality of remaining forest patches. Urban development and infrastructure projects pose additional pressure on the few known populations.

Threat summary

Habitat

This endemic species inhabits lowland tropical forests in Thailand, typically found in primary and secondary forest environments at elevations below 500 meters. It grows in the understory and forest edges of humid evergreen forests with rich, well-drained soils.

Forest· major

Conservation measures underway

Ex-situ conservation

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Frequently asked questions

Why is Polyscias thailandica classified as Critically Endangered?
Polyscias thailandica is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Polyscias thailandica faces severe threats from rapid deforestation and agricultural expansion across its limited range in Thailand's lowland forests. The species' extremely restricted distribution makes it particularly vulnerable to habitat fragmentation, while logging activities continue to reduce the quality of remaining forest patches. Urban development and infrastructure projects pose additional pressure on the few known populations.
Where does Polyscias thailandica live?
Polyscias thailandica occurs in Thailand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Polyscias thailandica?
The main threats to Polyscias thailandica are 2.1, 5.3, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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