TREACLE MUSTARD

Erysimum cheiranthoides

Cabbage Family [Brassicaceae]

month8jun month8june month8jul month8july month8aug month8sep month8sept

status
statusZarchaeophyte
flower
flower8yellow
morph
morph8actino
petals
petalsZ4
type
typeZspiked
stem
stem8angular
stem
stem8square
stem
stem8ribbed
sex
sexZbisexual

28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Grows to 60cm high (sometimes to 1m). Leaves narrow but lanceolate, fairly few in number.


9th Jan 2015, Stedham, West Sussex. Photo: © Dawn Nelson


9th Jan 2015, Stedham, West Sussex. Photo: © Dawn Nelson


9th Jan 2015, Stedham, West Sussex. Photo: © Dawn Nelson
Outer flowers reach slightly higher than the inner unopened flowers. Leaves without stalks, narrow lanceolate and with or without a few shallow teeth.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Flowers yellow 5 to 7mm. Seed pods cylindrical with some flattish surfaces, quite long - up to 2.5cm.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Seed pods have a short style and stigma attached. Sepals around flower greenish-yellow. Petals number 4 and are yellow, 3 to 6mm long.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Well-separated seed pods in long spikes.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Seed pods more or less erect.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson
Larger leaves peel off just beneath a branch. Narrower leaves on the branches.


28th Aug 2013, Millpond Bottom, Treyford, West Sussex. Photo: © Dawn Nelson


9th Jan 2015, Stedham, West Sussex. Photo: © Dawn Nelson
The stems are square or angular, and sometimes fluted as here. Lower leaves larger and with stalks which are half-round with a flattish upper surface.


Not to be semantically confused with : Swiss Treacle-mustard Erysimium rhaeticum, Spreading Treacle-mustard Erysimiumrepandum, Ball Mustard (Neslia paniculata), Tower Mustard (Turritis glabra), Hare's-ear Mustard (Conringia orientalis), Chinese Mustard (Brassica juncea), Black Mustard (Brassica nigra), White Mustard (Sinapi alba), Hoary Mustard (Hirschfeldia incana), Russian Mustard (Sisymbrium ), Hedge Mustard (Sisymbrium officinale), Horned Mustard (Sisymbrium polyceratium), Garlic Mustard (Alliaria petiolata) [plants with similar names and probably similar hot taste but in differing genera of the Brassicacea family]

Easily mistaken with other yellow-flowered similarly narrow-leaved Brassicaceae such as : Spreading Treacle-mustard (Erysimum repandum) (but that has larger petals, 6 to 10mm long [rather than the 3-6mm of Treacle Mustard]) or Steppe Cabbage (Rapistrum rugosum) (but that has waisted fruits)

It grows in arable and waste places in scattered locations throughout most of the British Isles but is either rare or local in them except in Central, Eastern and Southern England where it is more abundant.

It doesn't appear to be used to make mustard for the dinner table but was formerly used in the 16th Century for insect and animal bites.

The plant contains toxic Cardiac Glycosides of the Cardenolide type which affect the heart.


  Erysimum cheiranthoides  ⇐ Global Aspect ⇒ Brassicaceae  

Distribution
 family8Cabbage family8Brassicaceae

 BSBI maps
genus8Erysimum
Erysimum
(Wallflowers)

TREACLE MUSTARD

Erysimum cheiranthoides

Cabbage Family [Brassicaceae]