A narrow-leaved form, even has the same shothole problem prevalent among 'Otto Luyken' here.

I still think it was you but don't remember that much if kids were there. Wife black straight hair? Last Saturday at the Devonian gardens we talked about prunus Siberica and thought it to be a rather minor deviation of prunus Manchirica. Even though Siberica is likely to carry over the pink I still have one reserved thought that Robert Purvis knows of about Siberica. That it is an incredibly slow grower and is dwarf. Robert used to live in Alaska and in Idaho still does nothing but apricot in one of his collections in Washington. Gabe Botar was at the gardens who is another person knowing a great deal about apricot. He had scions of a prolific dwarf apricot with small good tasting fruits that he produced from crossed parents. Good stuff because slow growing and dwarf is always great for extreme cold or unprotected sites. For example flowering under the snow would delay bloom and escape the damaging spring frosts. If Clair Lammers (formerly from Edmonton) from Alaska ever grew Gabes apricot he would at least had fruits from this where all other his Manchurica experiments failed. My grandfather may have been around as a retired forester at the time those were planted and lived very close by. Only a remote possibility exists. I came across the trees a few years ago because I wanted to visit my childhood memories of the wading pool that still there in that place and not that anybody told me. Who ever planted them it seems very possible it was done from self pollinated Goldcot seeds similar the way you collected from the pink tree the seeds for another generation.

the bark seems a little whitish and smooth for Carpinus but it's in the range of variation I suppose This tree resembles pictures I've seen of Celtis africana, which Rachel Saunders told me she thought was probably one of the hardiest deciduous trees native to South Africa. But they are incredibly rare in Northern Hemisphere gardens, apparently. Probably incredibly rare gardens in outside of ZA, period. http://rbg-web2.rbge.org.uk/multisite/multisite3.php I'm trying a few...if they make it, they make it, if not, no great loss. It's interesting but not something astonishing like Bretschneidera. (It's possible mine will be a little hardier because there is some hybridization with other, Asian Celtis happening in its native range now. It definitely doesn't look like our native hackberry seedlings.) Still, could some intrepid South African brought seeds to the PNW decades ago? Not impossible!

and even better if you can get a pic of the leaves ... with scale ... the shape reminds me of quercus robur family ... ken https://duckduckgo.com/?q=quercus+robur&t=ffcm&iax=images&ia=images https://duckduckgo.com/?q=quercus+robur&t=ffcm&ia=web