There are a few: Cercis canadensis branches have a zig zag, Celtis occidentalis, Gleditsia triacanthos have the right stems but compound foliage, Kerria japonica, Neillia sininsis, Neviusia alabamensis, Ostrya virginiana, Davidia involucrata stem are somewhat in youth but I don't remember the other ones and normal Tree ID's usually only have the common plants. So, as you I am still searching.
for all your time.
