The red grape variety is an interspecific new variety between Alicante Ganzin x Trousseau Noir. Synonyms are Calif 526, California S 26, Kek Royalti and Royalti. It contains genes from Vitis rupestris and Vitis vinifera. The hybrid was crossed in 1938 at the California Agricultural Experimental Station by Harold P. Olmo (1909-2006). At the same time, the rather similar Rubired with the same mother variety was created here, both varieties were then released together in 1958. The late maturing Royalty is moderately tolerant to powdery and downy mildew. It produces dark-coloured wines, which are very suitable as Teinturier (dyer's grape). The variety is also used as a table grape. It is mainly cultivated in California's Central Valley. In 2010, a total of 97 hectares of vineyards were planted here (Kym Anderson).