Sorbus Domestica L., New to Wales and the British Isles. Hampton, M. 20:379–384.
Sorbus Domestica L., New to Wales and the British Isles [pdf]Paper  abstract   bibtex   
The discovery of two native or long-established populations of the mainly southern European tree Sorbus domestica L. (Rosaceae) in sea-cliff sites on the coast of southern Wales is reported. The True Service-tree had not been previously known as a native species or persistent introduction in Britain, with the exception of a single tree that formerly grew in the Wyre Forest in central England. Identification characters, including previously undescribed epidermal features, isozyme variation, and its ecology and associates at the two sites are described. Its occurrence and possible history in Britain are briefly discussed.

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