This generic "swap" has very serious ramifications. Spartina alterniflora is an widespread, species which is considered highly invasive in coastal ecosystems. It is well-known outside the botanical or even "grass" literature, by the name Spartina. Changing this generic allocation will cause great confusion in places that have developed monitoring programs for the spread of this species. If it is necessary for some "higher' reason to make this change, I suggest that [Spartina] be included in the documentation to forestall chaos in the fields other than grass systematics.
I understand your concern, but browsing for Spartina alterniflora will still return the same species. It's a 1-to-1 swap, not a split. But you can set the common name to Spartina if you want.
This is part of our change to Plants of the World (POWO) as the main taxonomic backbone for plants on iNat.
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
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.
This generic "swap" has very serious ramifications. Spartina alterniflora is an widespread, species which is considered highly invasive in coastal ecosystems. It is well-known outside the botanical or even "grass" literature, by the name Spartina. Changing this generic allocation will cause great confusion in places that have developed monitoring programs for the spread of this species. If it is necessary for some "higher' reason to make this change, I suggest that [Spartina] be included in the documentation to forestall chaos in the fields other than grass systematics.