An annual plant up to 1 m high, opposite leaves 4-8 cm long and 3-5 cm wide, white flowers, is a natural source of antioxidants, including chlorogenic acid, caffeic acid, myricetin, quercetin and flavonols.

An annual plant up to 1 m high, opposite leaves 4-8 cm long and 3-5 cm wide, blue or purple flowers, is a natural source of antioxidants, including chlorogenic acid, caffeic acid, myricetin, quercetin and flavonols.