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Citrus x aurantium L., pro sp. [Tangelo Group] [=Citrus reticulata Blanco X Citrus x aurantium L., pro sp. [Grapefruit Group]] (sensu Mabberley 1997, 2004); Citrus reticulata Blanco x Citrus paradisi Macfad. (sensu Swingle and Reece 1967; sensu Tanaka sec. Cottin 2002)
Hodgson (1967) noted that:
"According to Webber (1943), the rather unusual name for this natural tangelo is said to have been given to this unattractive but delicious fruit in the Canadian market which first received it. It was referred to as the "Ugly" citrus fruit. Soon thereafter, the name Ugli became the copyrighted trademark of G. G. R. Sharp, the principal and for some time the only Jamaican exporter.
From the information he was able to obtain, Webber (1943) concluded that Ugli originated as a chance seedling of unknown parentage near Brown's Town, Jamaica. It came to notice in 1914 and was propagated by F. G. Sharp at Trout Hall and first exported about 1934 by his son, G. G. R. Sharp. It is obviously a hybrid with characters that suggest mandarin and grapefruit parentage, hence Webber provisionally classed it with the tangelos. Partly because of the monoembryony exhibited by the seeds, it is the opinion of the writer that pummelo is the parent in question rather than grapefruit."
The Chiefland Budwood Facility (2010) provided the following notes on the cultivar (clone DPI-74): "Source tree from DPI pathology greenhouse in Winter Haven in 1978. The Ugli variety was discovered near Brown’s Town, Jamaica in 1914."
Crown compact or dense, not weeping. First-year twig surface glabrous; second- or third-year twig surface striate; thorns straight; prickles absent or not persistent. Petiole glabrous, length short; wings narrow, adjoining the blade. Leaflets one, margin crenate/crenulate or bluntly toothed, shade leaflet blades weakly conduplicate, sun leaflet blades weakly or strongly conduplicate. Scent of crushed leaflets mandarin-like. Fruit as broad as long or longer than broad; rind green-yellow (6), yellow (7-10), yellow-orange (11), or orange (12); rind texture medium rough (6-7) or rough (8); firmness leathery; navel absent; flesh orange; taste acidic-sweet.
Hodgson (1967) provided the following additional notes on the cultivar:
"Fruit large, broadly obovoid; usually with short, strongly furrowed neck or collar; apex truncated and commonly strongly depressed. Seeds few and monoembryonic. Rind color dull yellowish-orange; medium-thick, leathery, moderately rough and bumpy, somewhat ribbed, and loosely adherent. Segments about 12 and axis large and open. Flesh orange-colored; tender, very juicy; flavor rich and subacid. Maturity season late.
Tree reported to be upright-spreading and mandarin-like in appearance."
Hodgson (1967) additionally classified Ugli as a tangelo.
The Chiefland Budwood Facility (2010) provided the following additional notes on the cultivar (clone DPI-74): "Fruit is large, tangelo like, with rough, thick exterior peel and an open core. Fruit is green when mature. Large fruit, rough and bumpy. Season: Late"
Hodgson (1967) additionally noted that: "While the fruit is unattractive, its shipping and eating quality have given it a high reputation in Canadian and English markets and its production is increasing in Jamaica."
Chiefland Budwood Facility. 2010. 2010 Annual report July 1, 2009 - June 30, 2010. Bureau of Citrus Budwood Registration, Florida Department of Agriculture & Consumer Services, Winter Haven.
Cottin, R. 2002. Citrus of the World: A citrus directory. Version 2.0. France: SRA INRA-CIRAD.
Hodgson, R.W. 1967. Horticultural varieties of Citrus. In: Reuther, W., H.J. Webber, and L.D. Batchelor (eds.). The Citrus industry, rev. University of California Press. http://lib.ucr.edu/agnic/webber/Vol1/Chapter4.html.
Mabberley, D.J. 1997. A classification for edible Citrus (Rutaceae). Telopea 7: 167–172.
Mabberley, D.J. 2004. Citrus (Rutaceae): A review of recent advances in etymology, systematics and medical applications. Blumea 49: 481–498.
Swingle, W.T. and P.C. Reece. 1967. The botany of Citrus and its wild relatives. In: Reuther, W., H.J. Webber, and L.D. Batchelor (eds.). The Citrus industry. Ed. 2. Vol. I. University of California, Riverside. http://lib.ucr.edu/agnic/webber/Vol1/Chapter3.html.
Search for this cultivar in NCBI Entrez
Citrus ID Edition 2
October, 2011
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