Polycarpon
1 species naturalized Aust.; all states and territories except NT
*Polycarpon tetraphyllum
Spreading or prostrate, glabrous annual 6–12 cm high. Leaves obovate to spathulate, 5–12 mm long, petiolate, opposite or apparently in whorls of 4; stipules scarious. Flowers numerous in loose terminal cymes. Sepals 5, keeled, scarious on the margins, up to 2 mm long. Petals 5, entire, white, less than half as long as the sepals. Stamens usually 3. Styles 3. Capsule 3-valved. Widespread. Common weed in gardens and sheltered places. Introd. from Europe. Fl. spring–summer. Four-leaf All-seed