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Citrus aurantium L.
Citrus auriantium; Sour Orange

Life   Plantae   Dicotyledoneae   Rutaceae   Citrus

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Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium
Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium

Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium
Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium

Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium
Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium

Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium
Citrus aurantium
© Copyright Bobby Hattaway 2011 · 5
Citrus aurantium

Associates · map
FamilyScientific name @ source (records)
Agaricaceae  Phoma omnivora @ BPI (2)

Phoma @ BPI (5)
Aleyrodidae  Aleurothrixus floccosus @ CSCA_TCN (3)
Aphelinidae  Aphytis chilensis @ UCRC_ENT (4)

Aphytis comperei @ UCRC_ENT (14)

Coccophagus lycimnia @ UCRC_ENT (1)

Encarsia @ UCRC_ENT (20)

Encarsia citrina @ UCRC_ENT (40)

Encarsia perniciosi @ UCRC_ENT (12)

Paraphytis cochereaui @ UCRC_ENT (1)
Aphididae  Macrosiphum ( @ AMNH_PBI (8)

Rhopalosiphum maidis @ AMNH_PBI (10)
Botryosphaeriaceae  Diplodia aurantii @ BPI (1)

Diplodia hesperidica @ BPI (4)

Diplodia natalensis @ BPI (2)

Macrophoma @ BPI (1)

Phyllosticta arethusa @ 350878B (1); 350878A (1)

Phyllosticta hesperidearum @ BPI (3)

Sphaeropsis citri @ BPI (1)

Sphaeropsis henriquesii @ BPI (1)
Capnodiaceae  Capnodium camelliae @ BPI (5); 699010A (1); 699010B (1)

Capnodium citri @ BPI (4)

Capnodium @ BPI (2)
Ceratobasidiaceae  Rhizoctonia solani @ BPI (1)
Clavicipitaceae  Aschersonia aleyrodis @ BPI (1)

Aschersonia turbinata @ BPI (1)

Hypocrella turbinata @ BPI (1)
Davidiellaceae  Cladosporium citri @ BPI (4)

Cladosporium elegans @ BPI (1)

Cladosporium herbarum @ BPI (5)
Dermateaceae  Gloeosporium aurantiorum @ BPI (1)

Gloeosporium citri @ 394401A (1); 394401B (1)

Gloeosporium hesperidearum @ BPI (2)

Gloeosporium limetticola @ BPI (1)

Gloeosporium sphaerelloides @ BPI (1)

Hainesia aurantii @ BPI (1)
Diaporthaceae  Diaporthe citri @ BPI (3)

Phomopsis citri @ BPI (5)
Diatrypaceae  Eutypella citricola @ BPI (1)

Eutypella ludibunda @ BPI (1)
Elsinoaceae  Elsinoe australis @ BPI (4)

Elsinoe fawcetti @ BPI (4)

Elsinoe fawcettii @ BPI (175)

Sphaceloma australis @ BPI (1)

Sphaceloma citri @ BPI (1)

Sphaceloma fawcettii @ BPI (2)
Encyrtidae  Encyrtus aurantii @ UCRC_ENT (1)

Metaphycus @ UCRC_ENT (2)
Erysiphaceae  Oidium lactis @ BPI (1)
Ganodermataceae  Ganoderma fornicatum @ BPI (1)
Glomerellaceae  Colletotrichum gloeosporioides @ BPI (20)

Glomerella cingulata @ BPI (2)
Hyphodermataceae  Aegerita webberi @ BPI (1)
Hyponectriaceae  Physalospora malorum @ BPI (1)

Physalospora rhodina @ BPI (8)
Massarinaceae  Massarina usambarensis @ BPI (1)
Meliolaceae  Meliola cameliae @ BPI (1)

Meliola camelliae @ BPI (1)
Membracidae  Cyrtolobus rufulus @ UDCC_TCN (2)
Miridae  Coridromius chenopoderis @ AMNH_PBI (2)

Gn_orthotylinigp1 sp_005 @ AMNH_PBI (1)

Gn_orthotylinigp13 sp_001 @ AMNH_PBI (1)

Gn_orthotylinigp7 sp_003 @ AMNH_PBI (1)
Mycosphaerellaceae  Septoria arethusa @ BPI (1)
Myriangiaceae  Myriangium duriaei @ BPI (1)
Nectriaceae  Nectria episphaeria @ BPI (1)

Nectria haematococca @ BPI (1)
Patellariaceae  Tryblidiella rufula @ BPI (2)
Peniophoraceae  Peniophora @ BPI (1)
Phaeosphaeriaceae  Leptosphaeria bondari @ BPI (4)
Piesmatidae  Mcateella reidi @ AMNH_PBI (1)
Plectosphaerellaceae  Verticillium cinnamomeum @ BPI (2)
Pleosporaceae  Alternaria tenuis @ 446930B (1); 446930A (1)

Pleospora media @ BPI (1)
Polyporaceae  Polyporus maximus @ BPI (2)

Polyporus @ BPI (3)
Septobasidiaceae  Septobasidium albidum @ BPI (1)

Septobasidium pseudopedicellatum @ BPI (2)

Septobasidium siparium @ BPI (1)

Septobasidium @ BPI (3)
Tingidae  Epimixia sp_ms_aboccidente @ AMNH_PBI (2)
Trichocomaceae  Penicillium digitatum @ 411074A (1); 411074B (1)

Penicillium glaucum @ BPI (2)
Tubeufiaceae  Podonectria aurantii @ BPI (1)

Podonectria coccicola @ BPI (2)
Xylariaceae  Daldinia eschscholzii @ BPI (3)

Hypoxylon guarapiense @ BPI (1)

Hypoxylon haematostroma @ BPI (1)

Hypoxylon jecorinum @ BPI (1)

Hypoxylon stygium @ BPI (1)

Hypoxylon turbinatum @ BPI (1)

Sphaeria inflata @ BPI (1)

Xylaria @ BPI (3)
_  Ascochyta citri @ BPI (1)

Ascochyta citricola @ 371322A (1); 371322B (1)

Botryodiplodia diplocarpa @ BPI (5)

Botryodiplodia lecanidion @ BPI (1)

Coniothecium scabrum @ BPI (1)

Deuterophoma tracheiphila @ BPI (1)

Fumago salicina @ BPI (1)

Gn_ms_naranjakotta sp_ms_watheroo @ AMNH_PBI (1)

Pellicularia filamentosa @ BPI (1)

Podoxyphium yuccae @ 361389A (1); 361389B (1)

Sphaerostilbe coccophila @ BPI (1)

Trichothecium roseum @ BPI (1)

Ustulina vulgaris @ BPI (5)

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&pull 20q v5.145 20180528: Error 404 Not Found http://tai2.ntu.edu.tw/udth/bin/fot1.exe/browse?bid=3&page=513

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http://www.hort.purdue.edu/newcrop/morton/sour_orange.html ---> https://hort.purdue.edu/newcrop/morton/sour_orange.html
Index | Search | Home | Morton

Morton, J. 1987. Sour Orange. p. 130–133. In: Fruits of warm climates. Julia F. Morton, Miami, FL.

Sour Orange

Citrus aurantium

A species of multiple uses, the sour orange (Citrus aurantium, L.), is also known as bitter, bigarade, or Seville orange. In Spanish-speaking areas it may be called naranja ácida, naranja agria, or naranja amarga. In Arabia, it is naranji; in Italy, melangolo; in India, khatta; in Samoa, moli, in Guam, soap orange.

Sour Orange
Fig. 35: The sour orange (Citrus aurantium) has a rough, fairly thick skin, very sour juice.


The tree ranges in height from less than 10 ft (3 m) to 30 ft (9 m), is more erect and has a more compact crown than the sweet orange; has smooth, brown bark, green twigs, angular when young, and flexible, not very sharp, thorns from 1 in to 3 1/8 in (2.5-8 cm) long. The evergreen leaves (technically single leaflets of compound leaves), are aromatic, alternate, on broad-winged petioles much longer than those of the sweet orange; usually ovate with a short point at the apex; 2 1/2 to 5 1/2 in (6.5-13.75 cm) long, 1 1/2 to 4 in (3.75-10 cm) wide; minutely toothed; dark-green above, pale beneath, and dotted with tiny oil glands. The highly fragrant flowers, borne singly or in small clusters in the leaf axils, are about 1 1/2 in (3.75 cm) wide, with 5 white, slender, straplike, recurved, widely-separated petals surrounding a tuft of up to 24 yellow stamens. From 5 to 12% of the flowers are male.

The fruit is round, oblate or oblong-oval, 2 3/4 to 3 1/8 in (7-8 cm) wide, rough-surfaced, with a fairly thick, aromatic, bitter peel becoming bright reddish-orange on maturity and having minute, sunken oil glands. There are 10 to 12 segments with bitter walls containing strongly acid pulp and from a few to numerous seeds. The center becomes hollow when the fruit is full-grown.

Origin and Distribution

The sour orange is native to southeastern Asia. Natives of the South Sea Islands, especially Fiji, Samoa, and Guam, believe the tree to have been brought to their shores in prehistoric times. Arabs are thought to have carried it to Arabia in the 9th Century. It was reported to be growing in Sicily in 1002 A.D., and it was cultivated around Seville, Spain, at the end of the 12th Century. For 500 years, it was the only orange in Europe and it was the first orange to reach the New World. It was naturalized in Mexico by 1568 and in Brazil by 1587, and not long after it was running wild in the Cape Verde Islands, Bermuda, Jamaica, Puerto Rico and Barbados. Sir Walter Raleigh took sour orange seeds to England; they were planted in Surrey and the trees began bearing regular crops in 1595, but were killed by cold in 1739.

Spaniards introduced the sour orange into St. Augustine, Florida. It was quickly adopted by the early settlers and local Indians and, by 1763, sour oranges were being exported from St. Augustine to England. Sour orange trees can still be found in Everglades hammocks on the sites of former Indian dwellings. The first sweet orange budwood was grafted onto sour orange trees in pioneer dooryards and, from that time on, the sour orange became more widely grown as a rootstock in all citrus-producing areas of the world than for its fruit or other features. Today, the sour orange is found growing wild even in southern Georgia and from Mexico to Argentina.

It is grown in orchards or groves only in the Orient and the various other parts of the world where its special products are of commercial importance, including southern Europe and offshore islands, North Africa, the Middle East, Madras, India, West Tropical Africa, Haiti, the Dominican Republic, Brazil and Paraguay.


There are various well-established forms of the sour orange. In the period 1818-1822, 23 varieties were described and illustrated in Europe. A prominent subspecies is the Bergamot orange, C. aurantium, var. bergamia Wight & Arn., grown in the Mediterranean area since the 16th Century but commercially only in Italy. Trees grown in California and Florida under this name are actually the 'Bouquet' variety of sour orange (see below). The flowers of the Bergamot are small, sweetly fragrant; the fruits round or pear-shaped, with strongly aromatic peel and acid pulp.

The myrtle-leaved orange (C. aurantium, var. myrtifolia), is a compact shrub or tree with small leaves and no thorns. It was found as a bud mutation on trunks of old sour orange trees in Florida. It is propagated and grown only on the French and Italian Riviera for its small fruits which are preserved in brine and exported for candying.

Apart from these special types, there are several groups of sour oranges, within which there are placed certain cultivars:

1) Normal group (large, seedy fruits)

'African', 'Brazilian', 'Rubidoux', 'Standard', 'Oklawaha' and 'Trabut'. 'Oklawaha' originated in the United States. It has large fruits rich in pectin and is prized for marmalade.

2) Aberrant group

'Daidai' , or 'Taitai', popular in Japan and China. Its fruits are large with very thick peel, very acid pulp, and many seeds. The tree is somewhat dwarf and almost thornless; immune to citrus canker in the Philippines. It is prized for its flower buds which are dried and mixed with tea for their scent.

'Goleta' has medium-large fruits with juicy, medium-sour pulp and very few seeds. The tree is of medium size and almost thornless.

'Bouquet' has small, deep-orange fruits, acid, with few seeds. The tree is less than 10 ft (3 in) high and is grown as an ornamental.

3) Bittersweet group includes any sweet-acid forms of the sour orange introduced by Spaniards and formerly found growing in the Indian River region of Florida. These oranges are often seen in a naturalized state in the West Indies. The peel is orange-red, the pulp is darker in hue than that of the normal sour orange.

'Paraguay' was introduced from Paraguay in 1911. The fruit is of medium size, with sweet pulp, moderately seedy. The tree is large, thorny and hardy.

Among other forms of sour orange, there is in India a type called 'Karna', 'Khatta' or 'Id Nimbu', identified as C. aurantium var. khatta (or C. karna Raf.) but suspected of being a hybrid of sour orange and lemon. The fruits are typical sour oranges but the flowers are red-tinted like those of the lemon.

Two cultivars are grown as rootstocks for the sweet orange in China:

'Vermilion Globe' has oblate fruits containing 30 to 40 seeds. The tree has long, narrow, pointed leaves.

'Leather-head' has small, oblate, rough fruits with 20 seeds. The tree has elliptic, blunt leaves.

Cultivars grown especially for the production of Neroli oil in France and elsewhere, have flowers in large, more concentrated clusters than the ordinary types of sour orange. One of these, 'Riche Défouille', has unusual, wingless leaves.


The sour orange flourishes in subtropical, near-tropical climates, yet it can stand several degrees of frost for short periods. Generally it has considerable tolerance of adverse conditions. But the Bergamot orange is very sensitive to wind and extremes of drought or moisture.


Unlike its sweet relative, the sour orange does well on low, rich soils with a high water table and is adapted to a wide range of soil conditions.


Sour orange trees volunteer readily from self-sown seeds. As generally grown for rootstock for sweet oranges, they are raised in nurseries for 1 or 2 years and then budded. Growth of the seedlings, especially in diameter, has been expedited by weekly applications of gibberellic acid to the stems, making it possible to bud them much earlier.


In the proper climatic and soil conditions, the sour orange is self-maintaining and receives only a modicum of cultural attention. It has an extraordinary ability to survive with no care at all. Some trees in Spain are said to be over 600 years old and one tree in a tub at Versailles, which, of course, must be carefully tended, was reportedly planted in the year 1421.

Pests and Diseases

The sour orange is subject to most of the pests that attack the sweet orange. In addition to its susceptibility to the disease called tristeza, the tree is liable to other viruses -crinkly leaf, gummy bark, psorosis, and xyloporosis. The Division of Plant Industry of the Florida State Department of Agriculture has recorded the following fungal problems as sometimes seen: leaf spot ( AIternaria citri, Cercospora penzigii, Mycophaerella horii, Cladosporium oxysporum, and Phyllosticta hesperidearum); greasy spot (Cercospora citri-grisea); tar spot (C. gigantea); leprosis (Cladosporium herbarum); mushroom root rot (Clitocybe tabescens); anthracnose (Colletotrichum gloeosporioides); thread blight (Corticium koleroga and C. stevensii); gummosis and dieback (Diaporthe citri); foot rot and root rot (Fusarium oxysporum, Macrophomia phaseolina, Phytophthora spp.); heart rot and wood rot (Fomes applanatus, Ganoderma sessilis, Xylaria polymorpha), and others.

Dried peel of the locally-grown sour orange
Fig. 36: Dried peel of the locally-grown sour orange yields the essential oil that flavors "Curacao liqueur".

Food Uses

The normal types of sour orange are usually too sour to be enjoyed out-of-hand. In Mexico, however, sour oranges are cut in half, salted, coated with a paste of hot chili peppers, and eaten.

The greatest use of sour oranges as food is in the form of marmalade and for this purpose they have no equal. The fruits are largely exported to England and Scotland for making marmalade. Sour oranges are used primarily for marmalade in South Africa.

The juice is valued for ade and as a flavoring on fish and, in Spain, on meat during cooking. In Yucatan, it is employed like vinegar. In Egypt and elsewhere, it has been fermented to make wine.

"Bitter orange oil", expressed from the peel, is in demand for flavoring candy, ice cream, baked goods, gelatins and puddings, chewing gum, soft drinks, liqueurs and pharmaceutical products, especially if the water-or alcohol-insoluble terpenes and sesquiterpenes are removed. The oil is produced in Sicily, Spain, West Africa, the West Indies, Brazil, Mexico and Taiwan.

The essential oil derived from the dried peel of immature fruit, particularly from the selected types -'Jacmel' in Jamaica and the much more aromatic 'Curacao orange' (var. curassaviensis)-gives a distinctive flavor to certain liqueurs.

"Neroli oil", or "Neroli Bigarade Oil", distilled from the flowers of the sour orange, has limited use in flavoring candy, soft-drinks and liqueurs, ice cream, baked goods and chewing gum.

'Petitgrain oil', without terpenes, is used to enhance the fruit flavors (peach, apricot, gooseberry, black currant, etc.) in food products, candy, ginger ale, and various condiments.

'Orange leaf absolute' enters into soft-drinks, ice cream, baked goods and candy.

The ripe peel of the sour orange contains 2.4 to 2.8%, and the green peel up to 14%, neohesperidin dihydrochalcone which is 20 times sweeter than saccharin and 200 times sweeter than cyclamate. Potential use as a sweetener may be hampered by the limited supply of peel.

Food Value Per 100 g of Edible Portion

Fruit (raw) Fruit (raw, with only superficial layer of peel removed)*
Calories 37-66
Moisture 83-89.2 g 77.8-83.1 g
Protein 0.6-1.0 g 0.154-0.167 g
Fat trace-0.1 g 0.05-0.07 g
Carbohydrates 9.7-15.2 g ?
Fiber 0.4 g 1.8-2.2 g
Ash 0.5 g 0.57-0.69 g
Calcium 18-50 mg 64.3-81.9 mg
Iron 0.2 mg 0.22-0.85 mg
Phosphorus 12 mg 19.6-20.4 mg
Vitamin A 290 mcg or 200 I.U. 0.055-0.07 mg
Thiamine 100 mcg 0.048-0.059 mg
Riboflavin 40 mcg 0.030-0.040 mg
Niacin 0.3 mg 0.282-0.400 mg
Ascorbic Acid 45-90 mg 55.2-103.5 mg
*Sampled in Guatemala and El Salvador.

Other Uses

Soap substitute: Throughout the Pacific Island, the crushed fruit and the macerated leaves, both of which make lather in water, are used as soap for washing clothes and shampooing the hair. Safford described the common scene in Guam of women standing in a river with wooden trays on which they rub clothing with sour orange pulp, then scrub it with a corncob. He wrote: "Often the entire surface of the river where the current is sluggish is covered with decaying oranges." On the islands of Zanzibar and Pemba, the fruits are used for scouring floors and brass.

Perfumery: All parts of the sour orange are more aromatic than those of the sweet orange. The flowers are indispensable to the perfume industry and are famous not only for the distilled Neroli oil but also for "orange flower absolute" obtained by fat or solvent extraction. During favorable weather in southern France, 2,200 lbs (1,000 kg) of flowers will yield 36 to 53 oz (1,000-1,500 g) of oil.

Neroli oil consists of 35% terpenes (mainly dipentene, pinene and camphene), 30% 1 -linalool, and 4% geraniol and nerol, 2% d -terpineol, 6% d -nerolidol, traces of decyclic aldehyde, 7% 1 -linalyl acetate, 4% neryl and geranyl acetates, traces of esters of phenylacetic acid and benzoic acid, as much as 0.1% methyl anthranilate, and traces of jasmone, farnesol, and palmitic acid. Orange flower water is usually a by-product of oil production.

Petitgrain oil is distilled from the leaves, twigs and immature fruits, especially from the Bergamot orange. Both Petitgrain and the oil of the ripe peel are of great importance in formulating scents for perfumes and cosmetics. Petitgrain oil is indispensable in fancy eau-de-cologne. The seed oil is employed in soaps.

Honey: The flowers yield nectar for honeybees.

Wood: The wood is handsome, whitish to pale-yellow, very hard, fine-grained, much like boxwood. It is valued for cabinetwork and turnery. In Cuba it is fashioned into baseball bats.

Medicinal Uses: Sour orange juice is antiseptic, anti-bilious and hemostatic. Africans apply the cut-open orange on ulcers and yaws and areas of the body afflicted with rheumatism. In Italy, Mexico and Latin America generally, decoctions of the leaves are given for their sudorific, antispasmodic, stimulant, tonic and stomachic action. The flowers, prepared as a sirup, act as a sedative in nervous disorders and induce sleep. An infusion of the bitter bark is taken as a tonic, stimulant, febrifuge and vermifuge.

The fresh young leaves contain as much as 300 mg of ascorbic acid per 100 g. The mature leaf contains 1-stachyhydrine.

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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Plantae  
 Phylum Tracheophyta  
 Class Magnoliopsida  
 Order Sapindales  
 Family Rutaceae  
 Genus Citrus  
  Citrus aurantium    L. 
Provider: Ching-I Peng 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Citrus aurantium aurantium Citrus aurantium bergamia Citrus bergamia Citrus vulgaris   details
Citation: Flora of Taiwan 2nd ed. 3: 513, 1993
Name Code: 204448
   Wang,2012:VU   Wang,2012:VU   
Suggested Link    Discover Life    National Plant Genetic Resources Center    Flora of Taiwan 2nd eBooks (National Taiwan University)  
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Citrus+aurantium&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Citrus+aurantium&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 4
Query: SELECT * FROM img WHERE ready=1 and taxon like "Citrus aurantium%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

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Citrus aurantium
Citrus aurantium
Bitter Orange
ID: 0000 0000 0105 0269 [detail]
© 2005 Joseph Dougherty/ecology.org

Citrus aurantium
Citrus aurantium
Sour Orange
ID: 3333 3333 1207 0078 [detail]
© University and Jepson Herbaria

Citrus aurantium
Citrus aurantium
Bitter Orange
ID: 0000 0000 0515 2789 [detail]
2015 Nick Kurzenko

Citrus aurantium
Citrus aurantium
Bitter Orange
ID: 0000 0000 0515 2790 [detail]
2015 Nick Kurzenko

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