An acid fruit that is most commonly grown in the Philippine Islands although it is probably of Chinese origin. It is believed to be a natural hybrid, with kumquat in the parentage. In the Philippines it is sometimes called calamonding or calamansi. In the US and Canada, it is primarily planted as an ornamental, either growing in the ground or in a container. Calamondin trees flower and set fruit intermittently throughout the year, adding to the decorative appeal of these trees. A variegated form, with marbled leaves and faintly-striped fruit is sometimes marketed under the name Peters. Fruit very small, oblate to spherical; apex flattened or depressed. Rind color orange to orange-red; very thin, smooth, and finely pitted, easily separable only at maturity; sweet and edible. Segments about 9 and axis small and semi-hollow. Flesh orange-colored; tender, juicy, and acid. Seeds few, small, plump, polyembryonic, and with green cotyledons. Fruit holds on tree remarkably well. Tree of medium vigor, highly productive, upright and columnar, nearly thornless; leaves small, broadly oval, and mandarin-like. Strongly cold-resistant.