Richardia Kunth
Calyx 4–5-lobed. Mericarps 4
Floral leaves broad-obovate, mostly more than 5 mm wide, hairy on both surfaces. Leaves ovate to narrow-ovate, up to 2 cm long. Flowers up to 15 per head. Corolla 4-lobed; tube up to 2 mm long. Prostrate perennial with stems up to 20 cm long, sometimes forming dense mats. Hunter River Valley. Weed of cultivation. Introd. from S. America. Fl. spring–summer Richardia humistrata
Floral leaves narrow-ovate, up to 5 mm wide, usually glabrous on the upper surface. Leaves narrow-ovate to ovate, up to 2.5 cm long. Flowers often few per head some of which are often cleistogamous. Corolla 4-lobed; tube 2–4 mm long. Prostrate perennial with stems up to 15 cm long. Widespread. Weed of cultivation and waste places. Introd. from S. America. Fl. spring–summer Richardia stellaris