"Bunga jeumpa" may refer to "bunga cempaka" which is commonly known as "white cempaka" or "jasmine" in Indonesian. It is a beautiful flower with a pleasant and fragrant aroma. The white cempaka usually blooms at night and emits a distinctive scent during the evening. However, "bunga jeumpa" could also refer to other uncommon plants or flowers that may be specific to a certain region. If "bunga jeumpa" is referring to a particular plant in a specific area, it might be unique and known only in that region.