CR

Strychnos tetragona

Unknown

Overview

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

Strychnos tetragona faces severe population decline primarily due to extensive deforestation and agricultural conversion of its native forest habitat in Madagascar. The species' extremely limited range makes it particularly vulnerable to localized habitat destruction, while its slow growth rate as a woody climber hampers natural recovery. Collection pressure for traditional medicinal uses compounds these threats, as Strychnos species are valued for their alkaloid compounds.

Threat summary

Habitat

This endemic Malagasy species inhabits humid lowland and montane forests, typically growing as a woody climber in the forest understory and canopy edges. It requires intact forest ecosystems with stable moisture levels and is particularly associated with primary forest remnants in eastern Madagascar.

Forest· major

Frequently asked questions

Why is Strychnos tetragona classified as Critically Endangered?
Strychnos tetragona 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. Strychnos tetragona faces severe population decline primarily due to extensive deforestation and agricultural conversion of its native forest habitat in Madagascar. The species' extremely limited range makes it particularly vulnerable to localized habitat destruction, while its slow growth rate as a woody climber hampers natural recovery. Collection pressure for traditional medicinal uses compounds these threats, as Strychnos species are valued for their alkaloid compounds.
Where does Strychnos tetragona live?
Strychnos tetragona occurs in Sri Lanka. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Strychnos tetragona?
The main threats to Strychnos tetragona 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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