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...at first sight, but the leaves are cordate, and Poplar do not have cordate leaves (heart-shaped dip where the petiole - leaf stalk - joins the blade of the leaf).
It almost looks like Italian Alder, but too sharply pointed.
I'll be interested to see what IDs we get!
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
... the more I think it is not Poplar: it's always hard to tell from photos, but the petioles do appear to be plumply round, not flattened.
I considered P. lasiocarpa (but would have red petioles) and P. wilsonii (leaves not cordate) but I am not convinced.
This may be a silly question, but was it in an arboretum or the grounds of an old house?
... and you'll find that it is in the corner of a park.
Is one of the rarer birches a possibility? (It does have the texture and triangular shape of the black and balsam poplars.)
Yes, it's in the corner of park. There are black poplars close by, which look different to these.
Ok so I seemed to have opened a can of worms here, but the leaf shape and arrangement, long petiole and venation point to Populus. I know Alnus cordata well, and it's not an Alder.As for a Betula, even a rare one I think that's very unlikely.I think Populus are quite a difficult group to sort out unless you work with them regularly, but for the moment I'm going to stick with Populus.Everything about this observation has the 'feel' of a Poplar!
David J Trevan
...everything about it said "Poplar" as soon as I saw it, even the faulty colouration looked similar to some variegated Poplars I saw at ...er... forgotten where, somewhere I visited last year.
It's really the lack of flattened petiole that makes me resist: always hard to tell from photos, but they do appear to be round.
Lat/Lng: 51.592416666667, -0.11983611111111
OS grid ref: TQ303898