A genus of plants in the daisy family, commonly called fleabane, with aromatic leaves historically used for medicinal and repellent purposes.
From Greek konyzai, possibly from konos 'cone' or konein 'to prick.' The plant name traveled from ancient Greek herbals through medieval Arab medicine into European use, with medieval herbalists noting its flea-repelling properties.
Conyza was literally humanity's pesticide before modern chemistry—medieval people stuffed it in mattresses, scattered it on floors, and burned it to repel fleas, and 20th-century researchers actually confirmed it has natural insecticidal compounds, proving that ancient folk remedies were based on real chemistry.
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