Caryopteris

Caryopteris x clandonensis

Caryopteris x clandonensis A. Simmonds ex anon.
Deu.: Bartblume.
Bot. syn.: See Caryopteris incana (Thunb. ex Houtt.) Miq. x mongholica Bunge.

I have no articles for this botanical term, but there might be some for the next level down (if found).