Erysimum repandum

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Erysimum repandum Sturm2.jpg

|genus = Erysimum

|species = repandum

|authority = L.

}}

Erysimum repandum is a species of Erysimum known by several common names, including spreading wallflower,{{PLANTS|id=ERRE4|taxon=Erysimum repandum|accessdate=19 January 2016}} spreading treacle-mustard,{{BSBI 2007 |accessdate=2014-10-17 }} and bushy wallflower.

It is native to Eurasia, but it is known in many other parts of the world as an introduced species and a common roadside weed.

Erysimum repandum is an annual herb growing up to about {{cvt|0.5|m}} high. The leaves at the base of the stem are widely lance-shaped, bumpy or toothed along the edges, and up to {{cvt|15|cm}} long. The leaves higher up the stem are shorter, narrower, and more shallowly lobed or unlobed. The top of the stem is occupied by a raceme inflorescence of many yellow flowers. The fruit is a silique up to {{cvt|10|cm}} long.