Tawa-tawa/Gatas-gatas also known as Asthma Plant, pill bearing spurge grass weed which naturally grows and spread in the wild like ordinary grass which amazingly said can cure different ailments such as Sore Eyes, Asthma, Dengue Fever and Tuberculosis, High blood pressure, anti  Diarrhea, Deworming Agent,  Etc. Never tried this though there's a lot of it in our farm.