An alternative spelling of butterbur, referring to the same wetland plant with large leaves.
A variant spelling of butterbur with doubled 'r,' reflecting different regional and historical spelling conventions in English plant nomenclature.
English botanical names were never standardized until quite recently, so the same plant could be spelled in multiple ways depending on which region or herbalist's manuscript you consulted.
Complete word intelligence in one call. Free tier — 50 lookups/day.