Senega aquilonia:

https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77321266-1

https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&taxonid=66436

Senega cruciata:

https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77321268-1

https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&taxonid=3029

Polygala aquilonia has been recognized as a valid species distinct from Polygala cruciata since 2017, but not on iNaturalist.

Since only a few observations have been identified as Polygala cruciata var. aquilonia in the past, there is now the problem that many observations that are currently assigned to the species Senega cruciata actually belong to Senega aquilonia, especially in the northern regions.

Unfortunately, there is a relatively large overlap in the distribution areas, so many plants have to be re-identified because they may belong to either species.