Treacle mustard

Erysimum cheiranthoides

Find more about this plant on Wikipedia.

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Treacle-Mustard - You do have a critical distance The answer you planted into the fifteenth of thirty plant beds in the Dijksgracht park, part of the Twijfel Zaaien/Raising Doubts project. Latin name: Erysimum Cheiranthoides Artist family: Modernist
 Colour: Yellow

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A drink made from the crushed seed is used as a vermifuge. It is intensely bitter but has been used on children and expels the worms both by vomit and by excretion. A decoction of the root has been applied to skin eruptions. Source: https://pfaf.org/