Matthiola longipetala (Vent.) D C.

Two-horned Stock

Annual to 0.5 m tall. Leaves mostly round toothed but entire when young and in upper part of stems. Flowers with petals 1.5-2.5 cm long; flowering erratically all year. Fruit to 1.5 cm long, horns conspicuous, 2-10 mm long, seeds winged.

W Asia, N Africa, Europe (Night-scented Stock)

Strongly scented in the evening.

Occasionally found as an agricultural weed or garden escape.

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.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Brassicales
family       Brassicaceae
genus        Matthiola R.Br.