Of all our mature broadleaf trees surely the horse chestnut (Aesculus hippocastanum) has the most striking display of flowers. The wonderful flower spikes make the tree look like an enormous candelabra! It was the flower display that led the horse chestnut to be here in this country in the first place. It is native to the Balkans and Asia Minor and was brought here to adorn our parklands as long ago as the sixteenth century.
The horse chestnut is a prominent tree, usually found in avenues and in clusters in ornamental parks but some have self seeded elsewhere. Not only are the flower spikes and the conkers key features of this tree, it has a large, imposing frame, large seven-lobed leaves and, of course, has 'sticky buds' in spring. At junior school we used to put some twigs with sticky buds in a jam jar of water and watch them open
The centuries old game of 'conkers' is, I am told, dying out as schools have banned it on health and safety grounds but when I was young we used to collect the conkers to use in conker fights and buried one for a while which we thought would make harder! I guess if you do not go back and unearth it then there is a pretty good bet that a horse chestnut tree will appear.
Not a native but welcome none the less I think.