There are only 300 known individuals of this very rare species, sometimes known as Slender Whitebeam. Grows in rocky woodland with acid-neutral soils.

English endemic, found only on the north coasts of Somerset (near Minehead) and Devon (Watersmeet, East Lyn River).

Syn. *Sorbus subcuneata*. A triploid apomict evolving from Margaret’s Whitebeam (Aria margaretae; extremely rare and not featured) and Wild Service-tree (p. xxx).

Medium (15-18m), rarely suckering. Bark grey, maturing grey-brown. Buds sharply lanceoloid, white-haired at scale margins. Leaves obovate to rhombic-elliptic, 6-12cm, mid-green above, green-white downy below, acutely shallow-lobed, with 14-22 veins and biserrate margins, the apex acute and tapering, base wedge-shaped, on a slender 13-28mm petiole. Flowers white (12-15mm) with elliptic petals and cream anthers in a 10cm corymb (May-June). Fruit a medium pome (10-15mm), yellow ripening orange-brown with scattered lenticels (September-October). Devon Whitebeam differs: wider, rounder-based leaves.