We use Parietaria judaica and Parietaria officinalis interchangeably in our extracts, and these are the only Parietariaspecies we work with. A thorough review of the botanical literature suggests that P. judaica is likely a subspecies or phenotypic variant of P. officinalis, with minimal genetic distinction between them. While they may differ slightly in growth habit, their traditional uses are functionally identical. Dr. Yarnell concludes there is no meaningful difference between the two and advocates for recognizing them under a single Latin name.