Wrightia dubia[1] is a species of shrub-plant in the family Apocynaceae. Its distribution includes: Indo-China and peninsular Malaysia (Kedah, Penang, Pahan). There are no subspecies are listed in the Catalogue of Life. In Viet Nam, it may be called lòng mức ngờ, and in Malaysia it may be called bunga hantu ("ghost flower").[2]