Other of their roses bred in the same time frame are also listed as polyantha by the breeder, but listed as polyantha in some references and floribunda, fl, or flo in other references. My personal assumption is that the breeder referred to cluster-flowering bush roses as polyantha regardless of current culture.

I checked because the photos threw me off. In the event of people identifying roses using HMF, I thought it was useful to mention a floribunda they may be looking for may in fact be registered as a polyantha.