Hyssop is a herbaceous plant of the Lamiaceae family, native to Mediterranean regions, as far as Central Asia. The plant grows up to 60 cm long stem with narrow oblong leaves and small blue flowers. This aromatic plant is used for Chartreuse liqueur, and for coloring Absinthe. It also finds its ritual use in Catholic ceremonies where the priest places the hyssop in the ceremonial Aspergillum, which he plunges into a bowl of holy water. The priest then sprinkles the mixture over the congregation to bless them.