We think this tree was naturalised as it grew in a row with a variety of others including some which were obviously self-sown. It is always difficult to tell though and this may have been planted many years ago. The leaves are rounded to cordate (heart shaped bases) as the name suggests and the female cones were distincly larger than those in A. glutinosa (Alder).

Native in Italy and Corsica according to Stace, this is extensively naturalised in England, Wales and southern Scotland.