A natural tangor, a cross of mandarin and sweet orange. The medium-sized tree grows well and has an open, upright form. The fruits are quite large with a thick rind that varies from smooth to very rough, depending upon the rootstock and environmental conditions. King requires very hot climatic conditions to mature fruit of acceptable quality. The fruit shape is oblate and the rind is yellow-orange to orange at maturity. The flesh is deep orange and tender with a moderate number of seeds. King's season of maturity is late to very late, and the fruit stores well on the tree. Fruit large (among the largest of the mandarins), oblate to depressed globose; base sometimes short-necked but usually depressed and furrowed; apex flattened or depressed; areole moderately distinct. Rind thick (very thick for mandarins), moderately adherent but peelable; surface moderately smooth to rough and warty. Deep yellowish-orange to orange at maturity. Segments 12 to 14, readily separable; axis large and hollow. Flesh color deep orange; tender; moderately juicy; flavor rich. Seeds few to many and cotyledons cream-colored. Late to very late in maturity and stores well on tree. Tree moderately vigorous, upright and open in growth habit, and medium in size, with comparatively few thick, stiff and erect, thornless to moderately thorny branches. Foliage open and consists of large, dark-green, broadly-lanceolate leaves, the petioles of which are medium in length and narrowly wing-margined and the venation inconspicuous in comparison with most other mandarins. Very, productive but markedly subject to loss from tree breakage and fruit sunburn. Tree cold-resistant but less so than most mandarins.