CR

Duvaliandra dioscoridis

Stable

Overview

Duvaliandra is a species of plants in the Apocynaceae first described as a genus in 1980. It contains only one known species, Duvaliandra dioscoridis, native to the Socotra Islands in the Indian Ocean.

Duvaliandra dioscoridis faces severe threats from habitat destruction due to agricultural expansion and urban development across its limited range in the Arabian Peninsula. Overgrazing by livestock has degraded the arid shrubland ecosystems where this succulent species occurs, while climate change intensifies drought conditions in an already water-stressed environment. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances and collection pressure from succulent enthusiasts.

Threat summary

Habitat

This species inhabits rocky outcrops and gravelly slopes in arid shrubland and semi-desert environments of the Arabian Peninsula. It typically grows in well-drained soils among sparse vegetation at elevations between 200-800 meters.

Other threatened species in APOCYNACEAE

EN

Aspidosperma salgadense

Declining
EN

Rauvolfia steyermarkii

Declining
VU

Ceropegia rhynchantha

Declining
VU

Ceropegia loranthiflora

Unknown

Frequently asked questions

Why is Duvaliandra dioscoridis classified as Critically Endangered?
Duvaliandra dioscoridis 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. Duvaliandra dioscoridis faces severe threats from habitat destruction due to agricultural expansion and urban development across its limited range in the Arabian Peninsula. Overgrazing by livestock has degraded the arid shrubland ecosystems where this succulent species occurs, while climate change intensifies drought conditions in an already water-stressed environment. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances and collection pressure from succulent enthusiasts.
Where does Duvaliandra dioscoridis live?
Duvaliandra dioscoridis 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 Duvaliandra dioscoridis?
The main threats to Duvaliandra dioscoridis 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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