stingless bee is collecting pollen and nectar on wild melastoma malabathricum flower

senggani senduduk cengkodok yeh tan melastoma malabathricum flower rare medicinal plants herbs medicine traditional mouthwash toothache human health phytochemistry pharmacology treat diarrhoea dysentery hemorrhoids cuts wounds stomachache honey stingless bee sting trigona raw pure wild pollen nectar antibiotic drug collecting