Helianthus x laetiflorus

Helianthus x laetiflorus

Helianthus x laetiflorus Pers.
Engl.: cheerful sunflower, showy sunflower.
Suom.: preeria-auringonkukka.
Sven.: höstsolros.
Bot. syn.: See Helianthus pauciflorus x tuberosus., Helianthus scaberrimus Ell.

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