Dr. Hans Simon of Gärtnerei Simon in Germany, this non-registered cultivar is of unidentified parentage although it is an
According to the article
in The Gesellshaft der Staudenfreunde webiste, "The varieties
Kaiserstandarte', H. 'Gelber
Kaiser Han Wu Di' and H. 'Konkubine
Ersten Ranges' are assigned to the species H. 'Sieboldiana'. They come from the garden of
Mrs. Marianne Beuchert, she got it from the then (80s) two Botanical
Gardens of Beijing."