Robidoux, Rubideaux (sec. Cottin 2002)
Citrus trifoliata L. (sensu Mabberley 2004, Bayer et al. 2009); Poncirus trifoliata (L.) Raf (sensu Swingle and Reece 1967; sensu Tanaka sec. Cottin 2002)
Hodgson (1967) noted that: "The parent tree of Rubidoux was planted on the old Rubidoux site of the University of California Citrus Research Center, Riverside, about 1907 and came from the R. M. Teague Nursery Company at San Dimas, California."
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 long or very long; wings medium, adjoining the blade. Leaflets three, margin bluntly toothed, rachis wings absent, shade leaflet blades weakly conduplicate, sun leaflet blades weakly or strongly conduplicate. Leaflets not scented when crushed. Fruit as broad as long or longer than broad, rind yellow (7-10), yellow-orange (11), orange (12), or red-orange (13); rind texture slightly rough (4-5); medium rough (6-7) or rough (8); firmness leathery; navel absent; flesh green/greenish; orange or yellow; taste sour.
Hodgson (1967) provided the following additional notes on the cultivar: "While it belongs to the small-flowered group and has medium vigor in comparison with others, the writer knows of no other distinctive characteristics useful in its description or identification, though there may be such."
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.
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. 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 or NCBI Nucleotide
Citrus ID Edition 2
October, 2011
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