POWO accepts this in Nothofagus, and all but 4 other Nothofagus species were accepted in iNat in Nothofagus, including all of Nothofagus subg. Brassispora/Trisyngyne.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.