sage.
From The Oxford Companion to Beer
The Latin name for sage, Salvia officinalis, indicates the wide use of this perennial herb as a medical plant—the word salvia means to heal or save. Sage originated in the Mediterranean area, and today is widespread globally. It is antiseptic, antibacterial, antimicrobial, and anti-inflammatory. Sage is mentioned as a flavoring additive, along with hops, in old brewing literature, and was sometimes part of the brewing herb blend known as gruit.
Bibliography
This definition is from The Oxford Companion to Beer, edited by Garrett Oliver. © Oxford University Press 2012.