'Morden Ruby' is unique because it is a solid-red flowered flowered mutation from mottled selection. Occasionally, the flowers revert back to the mottled form."

Hardy Rose Breeding at the Morden Research Staiton
HortScience Vol. 27 (10), October 1992

In fact, 'Morden Ruby' in the nursery trade generally has mottled pink flowers.

Dependable and very pretty with its intense freckling.

Could any one tell me how to winterise a modern ruby sub zero rose tree Thanks