Latin capsula—a small box, referring to the fruit pod.
Annual herb. Flowers with erect non-saccate sepals; petals absent or with an elongated base. Fruit a notched and ridged silicula; seeds in 2 rows.
5 temperate to subtropical species, one is a cosmopolitan weed widespread in Australia in disturbed soils and gardens.
Source: (1997). Brassicaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.