This article first appeared in The Landscaper magazine in November 2019 A recent study published by the International Union for Conservation and Nature (IUCN) has found that more than half of Europe’s endemic trees - those that don’t exist anywhere else on earth - are threatened with extinction. Popular Tree species in the Sorbus genus, which include the Mountain Ash (Sorbus aucuparia subsp. maderensis) and the Crimean Rowan (Sorbus tauricola) are particularly vulnerable, wit