> D.intermedia * D.rotundifolia is an incredible hybrid!
Yes, indeed incredible! At least here in Europe nobody (I know of) has
managed to produce this hybrid artificially (in neither direction
after several attempts with different clones), and the Japanese
(otherwise very active in this respect) did apparently not try yet
(perhaps because _D.intermedia_ is not native in Japan and ?not easy
to cultivate there).
How sure is the ID of the plant (and of its parents!) you saw? Who did
breed it?
Kind regards
Jan