CR

Weinmannia ouaiemensis

Declining

Overview

Pterophylla ouaiemensis, formerly known as Weinmannia ouaiemensis, is a species of plant in the family Cunoniaceae. It is endemic to New Caledonia.

Weinmannia ouaiemensis faces severe threats from habitat destruction due to mining activities and agricultural expansion in its limited range. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, with deforestation and land conversion for nickel mining posing the most immediate risks. Climate change may further stress remaining populations by altering the specific microclimatic conditions this endemic tree requires.

Threat summary

Habitat

This endemic tree species inhabits humid montane forests and cloud forest environments in New Caledonia's mountainous regions. It typically grows in nutrient-poor, ultramafic soils at elevations where persistent cloud cover maintains high humidity levels essential for its survival.

Shrubland· major

Conservation measures underway

Site/area protectionEx-situ conservationAwareness & communicationsLegislation

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Frequently asked questions

Why is Weinmannia ouaiemensis classified as Critically Endangered?
Weinmannia ouaiemensis 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. Weinmannia ouaiemensis faces severe threats from habitat destruction due to mining activities and agricultural expansion in its limited range. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, with deforestation and land conversion for nickel mining posing the most immediate risks. Climate change may further stress remaining populations by altering the specific microclimatic conditions this endemic tree requires.
Where does Weinmannia ouaiemensis live?
Weinmannia ouaiemensis occurs in New Caledonia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Weinmannia ouaiemensis?
The main threats to Weinmannia ouaiemensis 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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