Treacle-mustard - Erysimum cheiranthoides


    Short to medium hairy plant with square stem. Leaves oblong, or lanceolate, untoothed to deeply toothed, but soon withering, stem leaves pointed, ascending. Flowers small, yellow, 5 to 6 mm. Fruit 10 to 50 mm, often slightly curved and square in section.

    Similar Species

    other yellow crucifers

    Identification difficulty
    ID guidance

    Seed-pods long and 'erecto-patent') - i.e sticking out at an angle from stem; seed-pods without beak, splitting into 2 valves with usually one row of seeds in each valve.  Hairy; hairs are stellate (i.e. branched).  Lower leaves entire, toothed

    Recording advice

    Photos of whole plant in habitat


    Waste places and road sides.

    When to see it

    June to August.

    Life History


    UK Status

    Fairly frequent in lowland England, scarcer elsewhere in Britain.

    VC55 Status

    Occasional in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 37 of the 617 tetrads.

    In the current Checklist (Jeeves, 2011) it is listed as Alien (neophyte); occasional

    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map