A Japanese name for the hybrids between E.sempervirens(red forms) and E. x setosum (diphyllum x sempervirens). A variable hybrid. Technically, I think
these should all be included in E.x setosum.
Fortunately, E.sempervirens has been separated from E.grandiflorum, or we would have to call the whole lot E. x youngianum.
This plant is fairly typical of the range of seedlings that are available.
From the same source, I also have this plant, which could easily be 'Sasaki', but could just as easily be a form of E.x youngianum.
The second form produces this red autumn colour and is completely deciduous.