Perhaps it is Hibiscus rosa-sinensis 'Madonna'.

I believe it is illegal to propagate or clone the Knock Out roses because they are registered. It says, âÂÂAsexual propagation without proper authorization is prohibited.â I have done propagation on antique roses. You just need to be careful about registration/copywrite/patent etc. Here is an article excerpt: According to the statement from Conard-Pyle, the nursery was in violation of United States Plant Patent Laws that state that no one may asexually propagate or sell any patented plant without the permission of the patent owner. âÂÂIllegal propagation is a matter that we take very seriously,â said Jacques Ferare, vice president of license for The Conard-Pyle Co. âÂÂAs the introducer of the Knock Out roses, we are committed to ensuring that Knock Out plants are grown only by legitimate growers. This not only protects these legitimate nurseries, it also guarantees that the consumer is getting the real thing and not a knockoff.â ItâÂÂs to ensure the rights of Knock Out brand of roses are being protected, Conard-Pyle is taking legal steps to enforce its trademark and plant patent rights throughout the horticultural industry. Most recently Conard-Pyle has joined forces with other major nurseries in hiring Plant Watch, a well-known monitoring program to help enforce its intellectual property rights.

Could it be Rhaphiolepis indica

Thank you! I thought it was until it bloomed, and was then confused.