Annual herb to 70 cm tall. Stems decumbent. Leaves opposite, usually heart-shaped at base, with large glandular dots on underside. Capitula about 7 mm across; summer. Florets usually blue, sometimes white or pink.
This species is available in a wide range of seed mixes and hybrid forms that are mostly dwarf and compact and vary from white to pink, lavender, blue, or bicoloured with white centres.
Source: (2002). Asteraceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.