Is pineapple a citrus fruit? What qualifies a fruit as being'citrus'?


No Pineapples are not citrus fruit. Citrus fruits have a peel, internal seeds, radial sectioning and an acidic juice. Thanks!

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Juice vesicles
The juice vesicles (or pulp) of a citrus fruit are the membranous content of the fruit’s endocarp. The vesicles contain the juice of the fruit. The pulp is usually removed from the juice by filtering it out. The juiciness of the pulp depends on the species, variety, season, and even the tree on which it grew. Pulp cells often have thin membranes, and they are less regular in shape than other plant cells. They are also very large and protect the seeds of the fruit. The color of the pulp is variable, depending on the species and the ripening stage. Usually, it has the color of the outer peel (exocarp).

Rangpur (fruit)
Rangpur, Citrus × limonia, also known as lemandarin, is a hybrid between the mandarin orange and the lemon. It is a citrus fruit with a very acidic taste and an orange peel and flesh. Common names for this fruit include rangpur, named after Rangpur, Bangladesh, a city known for this and other citrus fruits. This is where the word originated in the Bengali language. The rangpur is known as a Canton lemon in South China, a hime lemon in Japan, a cravo lemon in Brazil, and mandarin-lime in the United States. Citrus × limonia was introduced into Florida from Bengal in the late nineteenth century by Reasoner Brothers of Oneco, who obtained seed from northwestern India. Rangpurs are highly acidic and can be used as a substitute for commercial limes. However the name lime in connection with this fruit is often misleading, because there are very few similarities between the rangpur and other fruits called limes. In 2006, Diageo, Plc, introduced a rangpur-flavored version of Tanqueray gin, known simply as Tanqueray Rangpur. Citrus × limonia is cultivated as an ornamental tree for planting in gardens and a container plant on patios and terraces in the United States. Outside the U.S. it is used principally as a rootstock, except Costa Rica where it is also grown commercially and is preferred over lime and lemon. .

A hesperidium (plural hesperidia) is a modified berry with a tough, leathery rind. The peel contains volatile oil glands in pits. The fleshy interior is composed of separate sections, called carpels, filled with fluid-filled vesicles that are actually specialized hair cells. The outer ovary wall becomes the thick spongy layer, while the inner ovary wall becomes very juicy with several seeds. Oranges and other citrus fruits are common examples. Unlike most other berries, the rind of hesperidia is generally not eaten with the fruit because it is tough and bitter. A common exception is the kumquat, which is consumed entirely. The outermost, pigmented layer of rind contains essential oils and is known as the flavedo. When scraped off and used as a culinary ingredient it is called zest. The inner rind (known as pith or albedo) of the citron or lemon is candied in sugar and called succade. Linnaeus gave the name Hesperideæ to an order containing the genus Citrus, in allusion to the golden apples of the Hesperides.

The tangerine (Citrus tangerina) is an orange-colored citrus fruit which is closely related to the mandarin orange (Citrus reticulata). Taxonomically, it may be named as a subspecies or variety of Citrus reticulata; further work seems to be required to ascertain its correct scientific name. Tangerines are smaller than common oranges, and are usually easier to peel and to split into segments. The taste is considered less sour, but sweeter and stronger, than that of an orange. What can be considered by some][ to be a good tangerine will be firm to slightly soft, heavy for its size, and pebbly-skinned with no deep grooves, as well as orange in color. Peak tangerine season lasts from Autumn to Spring. Tangerines are most commonly peeled and eaten out of hand. The fresh fruit is also used in salads, desserts and main dishes. The peel is dried and used in Sichuan cuisine. Fresh tangerine juice and frozen juice concentrate are commonly available in the United States. The number of seeds in each segment (carpel) varies greatly. A popular alternative to tangerines are clementines, which are sometimes called seedless tangerines and are also a variant of the mandarin orange. Oranges have been cultivated for over 3,600 years in China.][ They are also high in concentration in present day Taunggyi, Burma.][ Tangerines have been found in many shapes and sizes, from the size of a small walnut, to larger than an average orange. Honey tangerines (murcotts as it is called in the industry) are the most widely grown tangerine, trailed by the sunburst tangerine, and with lowest amount of acreage, the fallglo. One of the oldest and formerly most popular varieties is the Dancy tangerine, but it is no longer widely grown. The Dancy was known as the zipper-skin tangerine, and also as the kid-glove orange, for its loose, pliable peel. The ponkan or Chinese honey tangerine is very popular around Melrose, Florida, where it was introduced from China by a missionary, Rev. Barrington, in 1883. It is easily peeled, much like a Satsuma mandarin, but has more flavor and grows true from the seeds. Growing tangerines from the seeds may take longer, as usually seven or eight years are required before the first fruit, but the trees will be more cold hardy than a similar grafted tree (even if grafted onto the cold hardy trifoliate orange rootstock) and larger. Seeds must be kept moist until planting. If they dry out, they will not germinate. Oranges do not always come true from seeds due to pollination and hybridization problems, but nearly all tangerines can be grown true from seed, contrary to popular notions. Tangerines are a good source of vitamin C, folate and beta-carotene.They also contain some potassium, magnesium and vitamins 1B, 2B and 3B. Also contains Lutein and Zeaxanthin. Tangerine oil, like all citrus oils, has limonene as its major constituent, but also alpha-pinene, myrcene, gamma-terpinene, citronellal, linalool, neral, neryl acetate, geranyl acetate, geraniol, thymol, and carvone. New research from The University of Western Ontario has discovered a substance in tangerine skins that not only prevents obesity in mice, but also offers protection against type 2 diabetes, and even atherosclerosis, the underlying disease responsible for most heart attacks and strokes. Murray Huff, a vascular biology scientist at the Schulich School of Medicine & Dentistry, along with Erin Mulvihill, a PhD student, studied the effects of a flavonoid in tangerines called Nobiletin. Their research is published in the journal Diabetes. According to the Oxford English Dictionary, the word "tangerine" was originally an adjective meaning "Of or pertaining to, or native of Tangier, a seaport in Morocco, on the Strait of Gibraltar" and "a native of Tangier." The OED cites this usage from Addison's The Tatler in 1710 with similar uses from the 1800s. The adjective was applied to the fruit, once known scientifically as "Citrus nobilis var. Tangeriana" which grew in the region of Tangiers. This usage appears in the 1800s. See the Oxford English Dictionary, 2nd edition, 1989.

Citrus limonum var. dulcis
The name sweet citron or sweet lemon refers to a citrus tree (Citrus medica L. var. dulcis) and its fruit. This fruit is often found being used in herbal medicine. Primarily, the juice of this fruit is used as it is not acidic, but rather, sweet. Other names include Mediterranean sweet limetta and the synonym Citrus limonum Risso. var. dulcis Moris. In Iran, the fruit is widely used and is called a "sweet lemon" (Persian: ‎).

Climacteric (botany)
The climacteric is a stage of fruit ripening associated with ethylene production and cell respiration rise. Apples, bananas, melons, apricots, tomatoes (among others) are climacteric fruit. Citrus, grapes, strawberries are non-climacteric (they ripen without ethylene and respiration bursts). However, there are non-climacteric melons and apricots, and grapes and strawberries harbour several ethylene receptors which are active. Climacteric is the final physiological process that marks the end of fruit maturation and the beginning of fruit senescence. Its defining point is the sudden rise in respiration of the fruit and normally takes place without any external influences. After the climacteric period, respiration rates (noted by carbon dioxide production) return to or below the point before the event. The climacteric event also leads to other changes in the fruit including pigment changes and sugar release. For those fruits raised as food the climacteric event marks the peak of edible ripeness, with fruits having the best taste and texture for consumption. After the event fruits are more susceptible to fungal invasion and begin to degrade with cell death.

Citrus industry in the Caribbean
The Citrus industry in the Caribbean is a major one in the Caribbean. Citrus fruits consists of oranges, pineapples, grapefruit, tangerines, limes, and lemons. The Caribbean countries which export citrus fruit are Belize, Jamaica, Puerto Rico, Guadeloupe, Dominica, Martinique & Trinidad & Tobago. The industry is an important one is it provides foreign revenue. In Belize, citrus fruit formed 14.1% of the exports in 1998 & brought in BZD$43.16 million dollars. The Caribbean exports citrus fruits in various forms such as in its normal form or processed into canned juices, canned segments, canned fruit and essential oils. Citrus products are exported to the United Kingdom, Canada, United States and other countries. Citrus production, along with sugar and bananas are the main agricultural exports. The main producing areas are the Pomona Valley and the Stann Creek Valley in the Stann Creek District. The 1999 output included 170,000 tons of oranges and 41,000 tons of grapefruit. About 40 square kilometres are under cultivation in the Stann Creek Valley with grapefruit occupying 25% of this area. Citrus is canned in the Stann Creek Valley where there are two processing plants. The harvesting season extends from August until the early part of the following year. Citrus production in Jamaica is not a large industry like bauxite or sugar but it yields enough for local consumption and export. The main producing areas are the weathered limestone soil in the parishes of Clarendon, St Catherine, St Mary, St Ann, Manchester and Westmoreland, between elevations of 1,000 feet (300 m) to 2,500 feet (760 m). There are processing plants in Bog Walk and Kingston. The harvest season runs from November to April. Citrus production in Dominica is a major export, also with bananas and coconuts. The main producing areas are in the Layou River Valley and on the southwest coast. In 1999, 21,000 tons of grapefruit, 1,000 tons of lemons and limes and 8,000 tons of oranges were produced.

Medicinal plants

Medicinal plants have been identified and used throughout human history. Toxic plants even have use in pharmaceutical development. Angiosperms (flowering plants) were the original source of most plant medicines. Some herbs and spices come from flowering plants.

Topics concerning medicinal plants include:

Tropical agriculture

Worldwide more human beings gain their livelihood from agriculture than any other endeavor; the majority are self-employed subsistence farmers living in the tropics]citation needed[. While growing food for local consumption is the core of tropical agriculture, cash crops (normally crops grown for export) are also included in the definition.

When people discuss the tropics, it is normal to use generalized labels to group together similar tropical areas. Common terms would include the humid-tropics (rainforests); the arid-tropics (deserts and dry areas); or monsoon zones (those areas that have well defined wet/dry seasons and experience monsoons). Such labeling is very useful when discussing agriculture, because what works in one area of the world will normally work in a similar area somewhere else, even if that area is on the opposite side of the globe.

Ornamental trees

Ornamental plants are plants that are grown for decorative purposes in gardens and landscape design projects, as houseplants, for cut flowers and specimen display. The cultivation of these, called floriculture, forms a major branch of horticulture.

Most commonly ornamental garden plants are grown for the display of aesthetic features including: flowers, leaves, scent, overall foliage texture, fruit, stem and bark, and aesthetic form. In some cases, unusual features may be considered to be of interest, such as the prominent and rather vicious thorns of Rosa sericea and cacti. In all cases, their purpose is for the enjoyment of gardeners, visitors, and/or the public.

Pineapple Fruit Peel
Fruit anatomy

Fruit anatomy is the internal structure of fruit, the mature ovary or ovaries from one or more flowers. In fleshy fruits, the outer and often edible layer is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds. Some edible "vegetables" such as the cucumber, squash, and tomatoes are actually botanical fruits.

In some seemingly pericarp fruits, the edible portion is not derived from the ovary. For example, in the fruit of the ackee tree, the edible portion is an aril; and in the pineapple several tissues from the flower and stem are involved.

Kumquat Citrus Agriculture
Food and drink

Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells in an effort to produce energy, maintain life, or stimulate growth.

Historically, people secured food through two methods: hunting and gathering, and agriculture. Today, most of the food energy consumed by the world population is supplied by the food industry.

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