Botanically, grapefruit belongs to the fruit tree genus Citrus in the Brassicaceae family, while Buntan pomelo is a fruit tree in the genus Pomelo. This means that grapefruit and pomelo belong to separate plant families. In commerce and everyday use, people often refer to pomelo and grapefruit collectively as "grapefruit" because of the similarities in appearance, taste and nutritional value. This name is also widely recognized and accepted.