Pictorial guide to the flora of the British Isles

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Erysimum cheiranthoides L.

treacle mustard (Brassicaceae / Cruciferae)

 SpreadBias within British IslesDirection of bias
WidespreadModerate tendencySE
Plant Atlas 2020
BSBI Distribution Map

Erysimum cheiranthoides is a Eurasian ruderal plant now found across the British Isles (but possibly native here in riparian habitats), especially on sandy soils.

Liberecký kraj, Czech Republic; 2024-09-30

 treacle mustard / Erysimum cheiranthoides: _Erysimum cheiranthoides_ is a Eurasian ruderal plant now found across the British Isles (but possibly native here in riparian habitats), especially on sandy soils.

Compared to our other Erysimum species, E. cheiranthoides has smaller flowers, and fruits borne at a greater angle from the stem.

Liberecký kraj, Czech Republic; 2024-09-30

 treacle mustard / Erysimum cheiranthoides: Compared to our other _Erysimum_ species, _E. cheiranthoides_ has smaller flowers, and fruits borne at a greater angle from the stem.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne