Family Rutaceae . Synonyms Aegle sepiaria Poncirus trifoliata. Its ability to withstand cold and moisture make it a popular candidate for citrus rootstock where it can have a dwarfing effect. Poncirus Trifoliata first crossed with the sweet orange, Citrus sinensis, about 100 years ago, has produced the citrange. The fruit is orange-green in color, which taste bitter and smell somewhat like pine. Trifoliate orange, bitter orange, orange-tree rootstock, Japanese bitter orange € 25,00 – € 50,00 Originally from northern and central China, this is the only deciduous citrus and is cold-hardy. Genus Citrus are typically evergreen shrubs or trees, frequently spiny, with simple, leathery, aromatic leaves, usually with winged stalks, and often fragrant … As I already mentioned, different citrus varieties naturally grow to different sizes. It is vigorous and highly drought-resistant. "This is the ordinary bitter orange so extensively employed as a rootstock and grown in Spain and elsewhere as a marmalade fruit. Sour orange (Common sour orange or Standard sour orange) also known as bitter orange and in food contexts as Seville orange very much resembles the sweet orange. ... Use as rootstock: Sour orange Citrus aurantium is one of the oldest and most widely used rootstocks for other citrus plants. The principal marmalade variety in Spain (Gonzalez-Sicilia, 1963) is Sevillano (Agrio de Espana, Real), which is said to consist of a group of selected clones characterized by vigor, comparative freedom from thorns, and productivity. (The old name for Poncirus was Citrus trifoliata, combined with orange gives citrange).There are several named varieties of citrange – I am presently growing seedlings of Morton, Troyer and Carrizo, as well as some budded plants of Benton. Poncirus trifoliata: a close relative of the genus Citrus, sometimes classified as Citrus trifoliata.It is especially resistant to cold, the tristeza virus, and the fungus Phytophthora parasitica (root rot), and grows well in loam soil. Other common names Japanese bitter orange . As a result the fruit is commonly used to make marmalade, syrup, or dried for use as a condiment. Orange trees grow bigger than mandarin trees, rootstock influence notwithstanding. But the rootstock a citrus tree has also influences how big it will grow, how dwarfed it will be. Rootstock influence. Also called hardy or bitter orange, ... Its greatest commercial value lies in the hardiness of its roots, which make it a preferred rootstock for grafting sweet orange trees. Sour orange: the only rootstock that truly is an orange (the Citrus × aurantium or bitter orange).