Syzygium malaccense is a species of flowering tree native to Malaysia, Indonesia Vietnam and Thailand. It has been introduced throughout the tropics, including many Caribbean countries and territories, such as Panama, Costa Rica, Jamaica, Puerto Rico, Suriname, the Dominican Republic, Honduras, Guyana, Trinidad and Tobago, Saint Lucia, Saint Vincent and the Grenadines and Venezuela.
Syzygium malaccense has a variety of common names. It is known as a Malay rose apple, or simply Malay apple, jambu merah, jambu bol, Malay rose apple, Otaheite cashew and pommerac. Despite the fact that it is sometimes called the otaheite cashew, syzygium malaccense is not related to cashew – an important distinction because cashews may trigger severe allergic reactions while syzygium malaccense does not appear to cause allergic reactions.
Highly ambiguous terms, such as "rose apple", "water apple", "mountain apple", "pomarrosa" or "plum rose" are sometimes used for this plant or its fruit; they can refer to almost any species of Syzygium grown for its fruit. The name "Otaheite apple" is used, too, but is better used for the Tahitian apple; "Otaheite" is an obsolete transcription of "Tahiti".