Dovyalis is a genus of shrubs and small trees. Recent genetic evidence has shown the genus to belong to the family Salicaceae; formerly it was classified in the family Flacourtiaceae. The 15 species are native to Africa (Ethiopia south to South Africa) and southern Asia (India, Sri Lanka). Some are cultivated for their fruit.
Dovyalis does not naturally appear in Scotland.
The context says that the genus is native to certain regions (Africa and SE Asia). Thus, it does not naturally appear in other regions such as Scotland. Such plants may have been transplanted, but they do not naturally appear there.