During a visit to the Isle of Arran to observe it’s endemic Sorbus microspecies the exciting discovery was made of a second extant plant of Sorbus pseudomeinichii, thus doubling the number of wild plants of this sorbus microspecies. This poster discusses, through a photographic phylogeny, the relationships between Sorbus aucuparia, Sorbus rupicola and three endemic sorbus microspecies that are found on Arran. We also give a history timeline of the discovery and description of the Sorbus microspecies on Arran as well as information regarding the discovery of a new tree of Sorbus pseudomeinichii, a internationally Critically Endangered species.