Hi @wildlandblogger. This taxon change is part of a set that I plan to make to align North American Campanuloideae with Nancy Morin's 2020 taxonomy changes. See the discussion on this observation for some background: https://www.inaturalist.org/observations/14977065 . I expected that these would have to be deviations from POWO, but POWO appears to have already accepted them all. See Rotanthella floridana here: https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77210640-1 .

After some delay, I’m starting the work of committing various taxon changes for North American species in the subfamily Campanuloideae to reflect Morin 2020 and match POWO. It possible that some of these changes will cause ID disagreements (e.g. a genus-level ID of Campanula, which previously would have supported a more precise ID might now be treated as disagreeing with species-level IDs such as Palustricodon aparinoides or Smithiastrum prenanthoides.

It is not feasible to construct atlases for each species within Campanula to enable a split of the genus. Therefore, I will endeavor to review these observations following the renaming of these taxa.