Anyway long story short, last year I informally attempted to hybridize Dwarf North Star cherry with the local wild black cherry and grew the seedlings out from both.

OK, all the wild black cherry seedlings look like wild black cherry seedlings, and there's a lot of them.

I only ended up with five or so seedlings from the Dwarf North Star cherry. Some appear to be genetically confused and are trying to flip-flop between different phenotypes. One appears to be more stable than the rest and doing well but it appears to be a cross between North Star and a sweet cherry. I don't recall the sweet cherries blooming concurrently with the North Star. So what are the odds of that?

I have a fungal infection that defoliates (ALL!) of my nursery bought cherry trees early summer. I dare not say what I think it is.

Out of the five North Star seedlings I grew this year, one is resistant and has not defoliated.

It could be times itself or perhaps with a wild black cherry.

I have a volunteer seedling growing next to my Lapin cherry tree that is resistant. It is startling to see Lapin completely defoliated but this seedling is still entirely foliated.

It's obviously a sweet cherry but is more cerrated than any I've seen.

Last but not least. A most interesting volunteer. Just recently noticed.

Completely unlike anything I've ever seen. It looks like North Star x Sweet cherry (or reciprocal) to me. Appears very disease resistant.

Thanks y'all.