A member of the poplar family ... which has only been recorded at two sites in Scotland. Another rare species specific to this tree is the aspen hoverfly (Hammerschmidtia ferruginea), the larvae ...

The Arran Whitebeam, found exclusively on the Isle of Arran in Scotland, is one of the world's rarest and most endangered tree species ... Black Poplar (Populus nigra subspecies betulifolia ...