Eupatorium odoratum

Description:  It is a multi-stemmed shrub which grows up to 2.5 m tall in open areas. It has soft stems but the base of the shrub is woody. In shady areas it becomes etiolated and behaves as a creeper, growing on other vegetation. It can then become up to 10 m tall. The plant is hairy and glandular and the leaves give off a pungent, aromatic odour when crushed. The leaves are opposite, triangular to elliptical with serrated edges. 

Flowering and Fruiting: Throughout the year.

Economic Importance: Eupatorium odoratum is a traditional medicinal plant that is widely used for its wound healing property. In particular, the several parts of this herb have been used to treat wounds, burns, and skin infections. 

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