Ok. I'm not doubting your ID and I hope you're correct because it means I now have a pollinator for what I thought was my only V. prunifolium.
However, the leaves on the volunteer are different from my older one. They are thicker and stiffer. When they harden they have a texture almost like a hellebore leaf. And they are glossier.
My first older plant has much softer leaves. And note the differences in the side by side.
Could the older one be a different species? Or is one a variant of the other? Or could it be due to provenance? I don't think it's a juvenile trait because my original one never looked like the younger one. Though I don't know if the older one came from seed or vegetative propagation.
Appreciate your help and I hope they are both prunifolium.
The first four photos are my older prunifolium.