CR

Wilmott's Whitebeam

Sorbus wilmottiana

StableENEUENEU

Overview

Aria wilmottiana, commonly known as Willmott's whitebeam, is a species of whitebeam in the family Rosaceae. It is endemic to England, and is found in the Avon Gorge, in Somerset and Gloucestershire. It is threatened by habitat loss.

Wilmott's Whitebeam is threatened primarily by scrub and bramble encroachment on the limestone cliffs of the Avon Gorge, which shades out seedlings and reduces suitable open rocky habitat. Its entire population is confined to this single gorge system, making it highly vulnerable to localised events such as path erosion, rockfall, or disturbance from recreational visitors. Low genetic diversity, a consequence of its apomictic reproduction, further limits its capacity to adapt to environmental change or emerging threats.

Threat summary

Habitat

Wilmott's Whitebeam grows on steep, sunlit limestone cliffs and rocky ledges within the Avon Gorge near Bristol, England, typically rooted in thin calcareous soils among open cliff-edge scrub.

Forest· majorShrubland· majorGrassland· majorRocky areas· major

Conservation measures underway

Species recoveryEx-situ conservation

Other threatened species in ROSACEAE

EN

Bristol Whitebeam

Sorbus bristoliensis

Increasing
EN

Arran Whitebeam

Sorbus arranensis

Declining
EN

Prunus detrita

Declining
VU

Sorbus degenii

Unknown

Frequently asked questions

Why is Wilmott's Whitebeam classified as Critically Endangered?
Wilmott's Whitebeam 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. Wilmott's Whitebeam is threatened primarily by scrub and bramble encroachment on the limestone cliffs of the Avon Gorge, which shades out seedlings and reduces suitable open rocky habitat. Its entire population is confined to this single gorge system, making it highly vulnerable to localised events such as path erosion, rockfall, or disturbance from recreational visitors. Low genetic diversity, a consequence of its apomictic reproduction, further limits its capacity to adapt to environmental change or emerging threats.
Where does Wilmott's Whitebeam live?
Wilmott's Whitebeam 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 Wilmott's Whitebeam?
The main threats to Wilmott's Whitebeam are 8.2. The full IUCN-classified threat record for this species is detailed on the species page.

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