This tool is part of the Citrus Resource

Citrus ID


Siamese Sweet




Siamese Acidless (sec. Cottin 2002)

Cultivar or taxon


Citrus maxima (Burm.) Merr. (sensu Mabberley 1997, Bayer et al. 2009; sensu Tanaka sec. Cottin 2002); Citrus grandis (L.) Osbeck (sensu Swingle and Reece 1967)



Hodgson (1967) noted that: "The clone known in the United States (fig. 4-60) was introduced by the U.S. Department of Agriculture in 1930 and was received by the Citrus Research Center, Riverside, California, under the name Siamese Sweet (CES 2240)."

The Chiefland Budwood Facility (2010) provided the following notes on the cultivar (clone DPI 203-16): "Collected for arboretum collection from Leon Hebb residence in Bartow in 1977. Fruit of medium size and pyriforme shape....Origin: Thailand. Late season January-March"



Crown compact or dense, not weeping. First-year twig surface pubescent; second- or third-year twig surface striate; thorns straight; prickles absent or not persistent. Petiole pubescent, length medium; wings narrow, medium or wide, adjoining the blade or tucking beneath blade. Leaflets one, margin entire or bluntly toothed, shade leaflet blades flat or weakly conduplicate, sun leaflet blades weakly or strongly conduplicate. Leaflets not scented when crushed. Fruit as broad as long or longer than broad; rind green-yellow (6), yellow (7-10), yellow-orange (11), or orange (12); rind texture slightly rough (4-5); firmness leathery; navel absent; flesh yellow; taste acidless-sweet.

Hodgson (1967) provided the following additional notes on the cultivar:

"The tree is typical of the Siamese group in all respects—dwarf and drooping, with round-pointed leaves and densely pubescent twigs and new shoot growth. The fruits are oblate to broadly obovoid, with large, crisp, easily separable juice sacs lacking in juice, and insipidly sweet with a trace of bitterness. Siamese Sweet is of horticultural interest primarily as a curiosity and also because it is the seed parent of the recently released Chandler variety (Cameron and Soost, 1961)."

The Chiefland Budwood Facility (2010) provided the following additional notes on the cultivar (clone DPI 203-16): "Greenish white flesh, good juice content and very good taste. Good yields and recommended as one of the better late pummelos."



Bayer, R.J., D.J. Mabberley, C. Morton, C.H. Miller, I.K. Sharma, B.E. Pfeil, S. Rich, R. Hitchcock, and S. Sykes. 2009. A molecular phylogeny of the orange subfamily (Rutaceae: Aurantioideae) using nine cpDNA sequences. American Journal of Botany 96: 668–685.

Cameron, J.W. and R.K. Soost. 1961. Chandler—an early-ripening hybrid pummelo derived from a low-acid parent. Hilgardia 30(12): 359–364.

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.

Mabberley, D.J. 1997. A classification for edible Citrus (Rutaceae). Telopea 7: 167–172.

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.



Search for this cultivar in NCBI Entrez or NCBI Nucleotide

Additional information on this cultivar at University of California: Riverside Citrus Variety Collection


Citrus ID Edition 2
October, 2011