Oldenlandia corymbosa

Description: Oldenlandia corymbosa is a widespread polymorphic weed with a pantropical distribution. It is fast-growing and can rapidly colonize disturbed areas, open sites, gardens, farmlands, forest edges, grasslands, roadsides and riverbanks. It is an annual herb with ascending or erect stems which are 4-angled. 

Flowering and Fruiting: August to October.

Economic Importance: Considered cooling, febrifuge, pectoral, digestive, diuretic, depurative, diaphoretic, stomachic, and vermifuge. Studies have shown antioxidant, anticarcinogenic, anti-malarial, antimicrobial, hepatoprotective, radioprotective, antipyretic, analgesic properties. 

Reference: https://en.wikipedia.org/wiki/Oldenlandia_corymbosa