pa is a wild growing fruit of Asian origin. Besides South China, it also grows in Myanmar, Thailand and Vietnam and is known by various names varying with the region. This fruit looks quite similar to sugar apple (Annona squamosa) but it has no taxonolical relationship even with the family annonaceae. Noina pa is the name of this fruit in Thai language and this literally means “wild sugar apple”. Hence they have started calling it wild sugar apple in English.