Crown compact or dense, not weeping. First-year twig surface glabrous or pubescent; second- or third-year twig surface striate; thorns absent or not persistent or straight; prickles absent or not persistent. Petiole glabrous or pubescent, length short, medium or long; wings absent, if present, narrow or medium, adjoining the blade. Leaflets one, margin entire or bluntly toothed, shade leaflet blades flat or weakly conduplicate, sun leaflet blades weakly or strongly conduplicate. Scent of crushed leaflets spicy or peppery, freshly lemon-like, or mandarin-like. Fruit broader than long, 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) or medium rough (6-7); firmness leathery; navel absent; flesh orange or yellow; taste sour.
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.