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.
other yellow crucifers
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
Photos of whole plant in habitat
Waste places and road sides.
June to August.
Fairly frequent in lowland England, scarcer elsewhere in Britain.
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
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015