Materia Medica

Gentianella quinquefolia stiff gentian with violet-blue flowers in a native streamside meadow

Agueweed / Stiff Gentian (Gentianella quinquefolia) — Five-Flowered Gentian / Gall-Weed

October 10, 2026

Agueweed / Stiff Gentian (Gentianella quinquefolia) materia medica covering botanical identity, name confusion with boneset, historical bitter-tonic use, preparations and historical dose context, evidence gaps, safety, native habitat, cultivation and...