Flowers: rather large; growing in a terminal corymb. Calyx: of four sepals that fall early. Corolla: of four cruciferous petals. Stamens; six; of which two are shorter than the others. Pistil: one. Pod: flat; lanceolate. Leaves: two, on the stem, whorled and divided into three toothed leaflets. Rootstock: long; fleshy and similar in taste to water-cress.
There is always a crispness and freshness about the mustards, meet them where we will. Undoubtedly among themselves they are very witty. This one is fond of rooting in leaf mold and we would sadly miss it from the May woods if some day it should learn the trick of wandering and stray from us far away