Identification: Arctostaphylos?

this shrub came up as an unexpected seedling among rhododendron seedlings. Any ideas?

 

What a beautiful shrub; definitely an Ericaceous family member - but which? I'd love to know because I'd like one of my own.
An hour later . . .
After spending a bit of time looking at lesser-known Ericaceous plants, I found this - Chamaedaphne calyculata - which looks remarkably similar. What do you think?

 

Could be! Where were the rhodo seedlings sourced from?

 

this was a gift from a rhododendron hybridizer, so no idea of source. But this species has been pointed out to me as a common inhabitant of sphagnum peat bogs in eastern Canada, so it may well have come in the peat moss the hybridizer had used...

 

Ah, yes, that is sounding very likely then.