Eclipta prostrata

Eclipta prostrata, the false daisy, is a species of plant in the family Asteraceae. It is widespread across much of the world. This plant has cylindrical, grayish roots. Solid, circular, purplish stems with white fine hairs 0.8m. Leaves arranged in opposite pairs, hairy in two-sided, lanceolate, serrated 2–12.5 cm long, 5–35 mm wide. The solitary flower heads are 6–8 mm (0.24–0.31 in) in diameter, with white florets. The bumpy achenes are compressed and narrowly winged. This species is native to North and South America. It also grows commonly in moist places in warm temperate to tropical areas worldwide. It can be found in habitats such as on marsh edges, along lake shores and river banks, and in brackish marshes and cypress depression swamps....read more on Wikipedia.