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Citrus japonica

Thunb.

Hong Kong wild kumquat

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桃子

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Citrus japonica, the round kumquat, Marumi kumquat, or Morgani kumquat, is a species of citrus fruit in the genus Citrus. It was first described by Carl Peter Thunberg in 1780 as Fortunella japonica. C. japonica is a native species in southern China.

Description

A shrub which keeps its leaves all year round. It grows about 2-4 m tall. It is spiny. The leaves are a narrow oval shape. They taper sharply at both ends. The leaf stalks have wings. The flowers are white, short and broad. The fruit are a flattened round shape. They are 1-2 cm across. They have 3-4 segments. The fruit become a bright orange when ripe.

Edible Uses

The fruit are used to make sweetmeats and candy, or preserved in honey and used as flavoring.

Traditional Uses

The fruit are used for sweetmeats and candy. The fruit are preserved in honey and used as flavouring.

This uses section is brief — help expand it

Distribution

It grows in subtropical locations.

Where It Grows

Asia, China*, Cuba, Fiji, Hainan, Hawaii, Hong Kong*, Japan, Korea, Mexico, Pacific, Samoa, SE Asia, Taiwan, USA, Vietnam, West Indies,

Production

It fruits during the winter months.

Other Information

It is a cultivated food plant.

Notes

The Fortunella's will probably be renamed Citrus. There are 5 Fortunella species.

Synonyms

Atalantia hindsii (Champ. ex Benth.) Oliv. × Citrofortunella madurensis (Lour.) D.Rivera & al. Citrus × aurantium var. globifera Engl. Citrus × aurantium var. japonica (Thunb.) Hook.f. Citrus × aurantium subsp. japonica (Thunb.) Engl. Citrus aurantium var. japonica (Thunb.) Hook. Citrus × aurantium var. olivicormis Risso ex Loisel. Citrus aurantium var. oliviformis Risso ex Loisel. Citrus erythrocarpa Hayata Citrus hindsii (Champ. ex Benth.) Govaerts Citrus inermis Roxb. Citrus japonica var. fructu-elliptica Siebold & Zucc. Citrus japonica var. madurensis (Lour.) Guillaumin Citrus japonica var. margarita (Lour.) Guillaumin Citrus kinokuni Yu.Tanaka Citrus madurensis Lour. Citrus margarita Lour. Citrus microcarpa Bunge Citrus nobilis var. inermis (Roxb.) Sagot Fortunella bawangica C.C.Huang Fortunella chintou (Swingle) C.C. Huang Fortunella crassifolia Swingle Fortunella hindsii (Champ. ex Benth.) Swingle Fortunella hindsii var. chintou Swingle Fortunella japonica (Thunb.) Swingle Fortunella margarita (Lour.) Swingle Fortunella obovata Tanaka Limonia monophylla Lour. Sclerostylis hindsii Champ. ex Benth.Sclerostylis venosa Champ. ex Benth.

Also Known As

Changshou kumquat, Chin chu, Chin tou, Formosan kumquat, Gold orange, Jin Gan, Kam quat, Kindzu, Long life kumquat, Shan chi kan

References (20)

  • Altschul, S.V.R., 1973, Drugs and Foods from Little-known Plants. Notes in Harvard University Herbaria. Harvard Univ. Press. Massachusetts. no. 1946 (As Fortunella hindsii)
  • Arora, R. K., 2014, Diversity in Underutilized Plant Species - An Asia-Pacific Perspective. Bioversity International. p 72 (As Fortunella hindsii) and (As Fortunella obovata)
  • Elevitch, C.R.(ed.), 2006, Traditional Trees of the Pacific Islands: Their Culture, Environment and Use. Permanent Agriculture Resources, Holualoa, Hawaii. p 265 (As Fortunella hindsii)
  • Facciola, S., 1998, Cornucopia 2: a Source Book of Edible Plants. Kampong Publications, p 220 (As Fortunella hindsii)
  • Hu, Shiu-ying, 2005, Food Plants of China. The Chinese University Press. p 501
Show all 20 references
  • John, L., & Stevenson, V., 1979, The Complete Book of Fruit. Angus & Robertson p 169 (As Fortunella hindsii)
  • J. Wash. Acad. Sci. 5:175. 1915
  • Lyle, S., 2006, Discovering fruit and nuts. Land Links. p 213 (As Fortunella hindsii)
  • Mem. Tanaka Citrus Exp. Sta. 1:45. 1927 (As Fortunella obovata)
  • Miguel, E., et al, 1989, A checklist of the cultivated plants of Cuba. Kulturpflanze 37. 1989, 211-357 (Also as Fortunella crassifolia, Fortunella japonica and Fortunella margarita)
  • Morton, J. F., 1987, Fruits of Warm Climates. Wipf & Stock Publishers p 183 (As Fortunella hindsii)
  • PROSEA handbook Volume 9 Plants yielding non-seed carbohydrates. p 188
  • PROSEA (Plant Resources of South East Asia) handbook, Volume 2, 1991, Edible fruits and nut. p 169
  • Segura, S., et al, 2018, The edible fruit species in Mexico. Genet Resour Crop Evol (2018) 65:1767–1793 (As Fortunella japonica and Fortunella margarita)
  • Staples, G.W. and Herbst, D.R., 2005, A tropical Garden Flora. Bishop Museum Press, Honolulu, Hawaii. p 508
  • USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Available: www.ars-grin.gov/cgi-bin/npgs/html/econ.pl (10 April 2000)
  • Valder, P., 1999, The Garden Plants of China. Florilegium. p 250, 252
  • Wiersema, J. H. & Leon, B., 2013, World Economic Plants. A Standard Reference CRC Press. 2nd Ed. p 309 (As Fortunella hindsii and Fortunella margarita)
  • World Checklist of Useful Plant Species 2020. Royal Botanic Gardens, Kew
  • Zeven, A. C. & de West, J. M. J., 1982, Dictionary of cultivated plants and their regions of diversity. Wageningen. p 45 (As Fortunella crassifolia and others)

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