Erysimum cheiranthoides is an annual or winter annual, erect 20-100 cm tall, often unbranched, stem leafy.
Leaves alternate, linear, mostly entire, finely hairy.
Flowers bright yellow, ca 0.8 cm wide, 4 petals, in a terminal raceme; blooms June- Aug.; self-fertile (autogamous), but with odor and visited by bees (Mulligan and Kevan 1973).
Fruit dry, a linear pod ca 2 cm long held erect on thin stalk along elongated raceme, seeds brown, 0.1 Cm.
Wetland status: FAC.
Frequency in NYC: Recently extirpated (2001).
Origin: Europe, now circumboreal, south to NC.
Habitat: Moist or wet open areas.