Phagat wrote "....
The majority of these locations are also arboretums or have experimental
gardens, but if someone were more comfortable finding the same locations
with the words "botanical garden" attached, use this search page instead:
http://www.bgci.org.uk/botanic_gardens/find_garden.html
which search page can, of course, also be used to search for herbaria.
........."

I did a search using Wales as "state" as it wont recognise Wales as a
country.
Of the results 3 may have some living examples all the others are museum or
university collections of preserved specimens.
--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk