Common peppercress
Lepidium africanum
An erect herb, usually about 300 mm tall with a basal rosette of stalked, toothed leaves and a single stem with stalked leaves, branched at the top to carry many 2 seeded pods held at right angles to the stem.
Flowers:
Small and white.
Ovary - Sessile stigma.
Sepals - 0.75 mm long.
Petals - 4, white and less than 0.5 mm long or absent.
Stamens - 2 or 4