"Hopelessly polyphyletic", Eichhornia was sunk into Pontederia, and Pontederia classified into a few subgenera, with former members of Eichhornia being split among the subgenera.
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.
