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Citrus ID


Kao Pan




Kao Panne White, Kao Panne, Nakhon Chaisi, Nakon, Nakorn, White Flat (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: "According to Groff (1927), Kao Pan is one of the most highly reputed varieties of Thailand and almost certainly originated in the Nakorn Chaisri district. Groff considers Nakorn to be a synonym. In California, however, Nakorn more closely resembles Kao Phuang; both clones were received from the U.S. Department of Agriculture in 1930. The reason for this discrepancy doubtless resides in the fact that the original introductions into the United States were budded plants in the case of Kao Pan and Kao Phuang and seeds in the case of Nakorn."

The Chiefland Budwood Facility (2010) provided the following notes under Nakon (clone DPI-831): "Selection from the USDA in 1984....Origin: Seedling of Nakon Chaisri of Thailand."



Crown compact or dense, not weeping. First-year twig surface pubescent; second- or third-year twig surface striate; thorns absent or not persistent; prickles absent or not persistent. Petiole pubescent, length short or medium; wings absent, if present, narrow, medium or wide, adjoining the blade. Leaflets one, margin bluntly toothed, shade leaflet blades weakly conduplicate, sun leaflet blades weakly conduplicate. Scent of crushed leaflets sweetly orange-like. Fruit as broad as long or longer than broad; rind green-yellow (6), yellow (7-10), or yellow-orange (11); rind texture slightly rough (4-5); firmness leathery; navel absent; flesh red/purplish-tinged or yellow; taste grapefruit-like.

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

"Fruit medium-large, subglobose to spherical; apex slightly depressed; seedy if open-pollinated, but otherwise not (Soost, 1964). Lemon-yellow (deeper than most) at maturity. Rind medium-thick; faintly pebbled with prominent oil glands; tightly adherent. Segments numerous (12-15); carpellary membranes thick and tough; axis medium-small and solid. Juice sacs large, fleshy, easily separable, and moderately juicy. Flavor sweet and mildly acid. Early in maturity.

Tree medium-small, round-topped and drooping, nearly thornless; leaves medium-large and round-pointed; twigs and new shoots densely pubescent; large, woody flowers."

The Chiefland Budwood Facility (2010) provided the following additional notes under Nakon (clone DPI-831): "Large fruit, bell or pear shaped, not as seedy as most. Greenish white flesh color, less juicy than some, 50 seeds. Good yield, early maturity (October)....Early-mid, December-February"



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.

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.

Groff, G.W. 1927. Culture and varieties of Siamese pummelos as related to introductions into other countries. Lingnan Science Journal 5: 187–254.

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.

Soost, R.K. 1964. Self-incompatibility in Citrus grandis (L.) Osbeck. Proceedings of the American Society of Horticultural Science 84: 137–140.

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.



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Citrus ID Edition 2
October, 2011