One of the ARS Magazines from the 1990s has the full parentage of this rose and other Twomey roses. I remember it being 2 orange floribunda types x Royalty, but I cannot recall which ones....

I grew this rose when it was new. It was very pretty. It was a shorter grandiflora, with nice sprays and everlasting chinese scarlet blooms. I liked it. I had some BS on the bottom, but most roses back then did. The vigor was moderate, and the repeat was good.