Four plants, including feverfew (Tanacetum species) and a tulip (Tulipa variegata): flowering stems. Etching by N. Robert, c. 1660, after himself.

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Four plants, including feverfew (Tanacetum species) and a tulip (Tulipa variegata): flowering stems. Etching by N. Robert, c. 1660, after himself. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.