Greenflower pepperweed

Height: 20–30 cm (8–12 in.). Stem usually branching from stem like a candelabra, with dense, spreading hairs, greyish green. With almost no fragrance.
Flower: Corolla regular (actinomorphic), very small; petals vestigial–lacking. Sepals 4, narrow, with membranous wings, glabrous–hairy, approx. 1 mm (0.04 in.) long. Stamens 2(–4). Gynoecium fused, a single carpel. Inflorescence a raceme, extending in fruiting stage.
Leaves: Alternate, lowest soon falling, central and upper leaves stalkless. Lowest leaf-blades lobed, Upper lanceolate–linear, with narrow base, lobeless, at least tip with toothed margins, 3-veined.
Fruit: 2-seeded, roundly obovate (widest at tip), flat, with shallowly notched tips, tip narrowly winged, approx. 2.5 mm (0.1 in.) long silicula. Stalk quite erect, upper surface short-haired, at least as long as silicula.
Habitat: Railway embankments and yards, harbours, occasionally yards, streets and roadsides.