During the week we went to the Wetlands and Wildfowl Trust place at Barnes
for the look see and whilst there I notices a couple of small trees, about
15ft tall, that had erect racemes of large Penstemen like blue flowers. Now
they looked like Jacaranda to me but I haven't yet had a reply from them
about these trees.
If anyone lives near Barnes and fancies taking a look, they are in the
Americas bit if I remember correctly planted amongst other bushes etc. near
one of the entrances/exits.
It's a rather flat exposed site too.

--
Regards
Bob

Some photos of my plants at.....