From Latin luna—moon, referring to the appearance of the mature translucent fruits.

Biennial or perennial herbs. Leaves simple, toothed. Flowers in terminal clusters; inner sepals with sacs at the base; petals purple (rarely white). Fruit strongly flattened silicula with a broad septum; seeds several in each chamber, valves and seeds shed to leave the translucent septum.

Fruit more than 1.5 cm wide with several seeds per chamber and a broad partition, when dry becoming translucent.

3 species from C and SE Europe.

Source: Spencer, R. (1997). Brassicaceae. In: Spencer, R.. 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.