Treacle mustard plant (Erysimum cheiranthoides): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1801.
Wellcome Collection

Treacle mustard plant (Erysimum cheiranthoides): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1801.

http://data.europeana.eu/agent/149761 · 1801

CC0 — Public Domain
Wellcome Collection

Lettering: Erysimum cheiranthoides

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