Unproven Benefits. Gumamela is the philippine term for the hibiscus flower. It is a source of vit. C. It has been used in a number of different cultures as a expectorant, diuretic, emollient, anti-infectious, anti-inflammatory, and antipyretic. It has been added to a number of different creams and lotions for these reasons. Initial studies indicate that hibiscus tea may be beneficial in lowering blood pressure.