Lepidium Didymum

Annual or biennial, foetid herb with slender tap-root and prostrate or ascending, much branched, shortly pilose stems up to 40–50 cm. tall.

Flowers small, whitish, pedicellate, pedicels 1–2 mm. long, in rather dense racemes elongating to about 6 cm., appearing extra-axillary or leaf-opposed but really terminal.

Fruit 1.5–1.8 x 2.5 mm. constricted at the septum into 2 subspherical, reticulate-pitted 1-seeded mericarps.