Cycas siamensis
VU

Cycas siamensis

Declining

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Cycas_siamensis

Overview

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

Cycas siamensis faces severe pressure from overcollection for the horticultural trade, where mature specimens command high prices as ornamental plants. Habitat destruction through agricultural expansion and urban development has fragmented remaining populations across its limited range in Thailand and Cambodia. The species' extremely slow growth rate, taking decades to reach reproductive maturity, makes recovery from population declines particularly challenging.

Threat summary

Habitat

Cycas siamensis inhabits dry deciduous forests and rocky limestone outcrops in Thailand and Cambodia. The species typically grows in well-drained soils on hillsides and forest edges at elevations up to 500 meters.

Forest· majorGrassland· majorRocky areas· major

Conservation measures underway

Site/area protectionSpecies recoveryAwareness & communicationsLegislation

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Frequently asked questions

Why is Cycas siamensis classified as Vulnerable?
Cycas siamensis is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Cycas siamensis faces severe pressure from overcollection for the horticultural trade, where mature specimens command high prices as ornamental plants. Habitat destruction through agricultural expansion and urban development has fragmented remaining populations across its limited range in Thailand and Cambodia. The species' extremely slow growth rate, taking decades to reach reproductive maturity, makes recovery from population declines particularly challenging.
Where does Cycas siamensis live?
Cycas siamensis occurs in Cambodia, Laos, Myanmar (Burma), Thailand, and Vietnam. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Cycas siamensis?
The main threats to Cycas siamensis 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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