Valerian (Valeriana dioscoriodes Sibth.): flowering stem with separate rooting stem and floral sections. Coloured etching by M. Bouchard, 1774.

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Valerian (Valeriana dioscoriodes Sibth.): flowering stem with separate rooting stem and floral sections. Coloured etching by M. Bouchard, 1774. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.