Willughbeia sarawacensis

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''Willughbeia sarawacensis'', commonly known as ''tabo'' (Philippines) and ''kubal'' or ''kubal madu'' (Malaysia), is a large tropical vine-bearing plant with edible fruit native to Palawan and to the nearby island of Borneo. There are four related varieties known in Borneo: kubal asam or kubal taya, kubal tusu or kubal madu, kubal arang (all fall under ''Willughbeia sarawakensis''), and another much bigger cousin tabau (''Willughbeia elimeri''). Provided by Wikipedia