Wein K (1912) X Achillea abscondita (A. millefolium X nobilis) K. Wein, nov. hybr. Repertorium novarum specierum regni vegetabilis 11(21-25): 395-396. doi: 10.1002/fedr.19120112107.
There is no corrections for Aesculus × woerlitzensis yet.