Annual herb; stems erect, leafy, branched below, (5)-10-18-(45) cm tall. Lvs entire, stellate-hairy, (2)-5-10 × (1)-2-4 mm; basal lvs oblanceolate to obovate; stem lvs narrower. Infl. a raceme, (5)-10-15 cm long; pedicels spreading, hairy, 2-3-(4) mm long. Sepals stellate-hairy, persistent at fruiting, 3 × 1 mm. Petals hairy beneath, obtuse to shallowly emarginate, 4-6 × 1-1.5 mm. Outer filaments with slender paired appendages. Silicle almost circular, shortly emarginate, inflated in centre, 3-4 × 3-(4) mm; valves stellate-hairy; veins faint or 0; style 0.3-0.4 mm long. Seeds brown, ovoid, flattened, narrowly winged, 1.5 × 1 mm, usually 2 per locule.