The tansy beetle is a species of leaf beetle. The common name derives from its main foodplant, tansy, but it can also use other wetland plants such as gypsywort and water mint. It measures 7.7–10.5 mm

Tansy is a perennial, herbaceous flowering plant in the genus Tanacetum in the family Asteraceae, native to temperate Europe and Asia. It has been introduced to other parts of the world, including Aus