Kumintang Plant with white flowers

This is called a "kumintang plant" the flowers are medicinal we used to gather its flowers wash it to clean and put it into the glass or a pitcher of water to drink.

It looks like this when its ready to drink we just add water again when its empty until it has already a bad smelling taste thats the time we need to stop drinking the water with a white flowers and we are going to pick for another new fresh flowers back and do the same.