Plum trees are quite poetic looking. This is because they have a habit of growing at an angle. They don't all produce fruit which is tasty; in London they rarely produce fruit at all. In common with most fruit trees the ones used to produce fruit, commercially, are subspecies, specially bred for this purpose.

              Sometimes, but not always, their leaves are red, and not green. Apart from this they all have the same basic shape and form. The ones at Tavistock Square are red. They tend, in common with a lot of fruit trees, to have a rugged bark, and they are one of the biggest of the fruit trees.

Leaf patterns.