Treacle mustard plant (Erysimum cheiranthoides): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1801.
- Sowerby, James, 1757-1822.
- Date:
- 1 October 1801
- Reference:
- 25195i
Licence: Public Domain Mark
Credit: Treacle mustard plant (Erysimum cheiranthoides): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1801. Wellcome Collection. Source: Wellcome Collection.