Citrus fruit | Fruit Pictures, Photos, Images & Fotos { 122 images } Created 15 Jan 2010

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Citrus is a common term and genus (Citrus) of flowering plants in the rue family, Rutaceae. Citrus is believed to have originated in the part of Southeast Asia bordered by Northeastern India, Myanmar (Burma) and the Yunnan province of China. Citrus fruit has been cultivated in an ever-widening area since ancient times; the most well known examples are the oranges, lemons, grapefruit and limes.

These plants are large shrubs or small trees, reaching 5–15 m tall, with spiny shoots and alternately arranged evergreen leaves with an entire margin. The flowers are solitary or in small corymbs, each flower 2–4 cm diameter, with five (rarely four) white petals and numerous stamens; they are often very strongly scented. The fruit is a hesperidium, a specialised berry, globose to elongated, 4–30 cm long and 4–20 cm diameter, with a leathery rind surrounding segments or "liths" filled with pulp vesicles. The genus is commercially important as many species are cultivated for their fruit, which is eaten fresh, pressed for juice, or preserved in marmalades.

Citrus fruits are notable for their fragrance, partly due to flavonoids and limonoids (which in turn are terpenes) contained in the rind, and most are juice-laden. The juice contains a high quantity of citric acid giving them their characteristic sharp flavour. They are also good sources of vitamin C and flavonoids.

The pomelo (Citrus maxima or Citrus grandis) is a citrus fruit native to Southeast Asia. It is usually pale green to yellow when ripe, with sweet white (or, more rarely, pink or red) flesh and very thick pudgy rind. It is the largest citrus fruit, 15–25 cm in diameter, and usually weighing 1–2 kg. Other spellings for pomelo include pummelo, and pommelo, and other names include Chinese grapefruit, jabong, lusho fruit & pompelmous. The Chandler is a Californian variety of pomelo, with a smoother skin .

The pomelo tastes like a sweet, mild grapefruit, though the typical pomelo is much larger in size than the grapefruit

Lime is a term referring to a number of different fruits, both species and hybrids, citruses, which are typically round, green to yellow in color, 3–6 cm in diameter, and containing sour and acidic pulp

Limes are a small citrus fruit, Citrus aurantifolia, whose skin and flesh are green in color and which have an oval or round shape with a diameter between one to two inches

In order to prevent scurvy during the 19th century, British sailors were issued a daily allowance of citrus such as lemon, and later switched to lime, which was not as effective at preventing scurvy but led over time to the nickname "limey" for all Britons. It was later discovered that the greater effectiveness of lemons derived from the 4-fold higher quantities of Vitamin C lemon juice contains compared to the West Indian limes used by the British

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