A relatively tall sub-shrubby species almost unknown in cultivation it seems - the name is very much in doubt too. Nonetheless an interesting species looking somewhat like a Weigela out of flower but with rich purple flowers in late summer.
Hardiness is uncertain but there has been a good-sized specimen in the walled garden at Wakehurst for some time now. (The foliage in the photos is of a Philadelphus)
3L pots ~ £12