While the Washington Navel orange is often considered the defining fruit of California citrus, the state produces a wide range of specialty citrus varieties that reflect both global plant introductions and regional adaptation.
These varieties include tangelos (grapefruit–mandarin hybrids), Eureka and Lisbon lemons, Oro Blanco grapefruit hybrids, and increasingly, Australian finger limes (Citrus australasica). Many of these fruits are cultivated in microclimates across Southern California, where variations in elevation, temperature, and soil composition contribute to distinct flavor profiles.
Finger limes, sometimes referred to as “citrus caviar,” have attracted particular attention in recent years. Native to Australia, they produce elongated fruits filled with vesicles that resemble pearls. In addition to their culinary appeal, finger limes have been noted for their relative resistance to the Asian citrus psyllid, the insect vector responsible for spreading citrus greening disease (huanglongbing, or HLB). While no citrus variety is fully immune, this tolerance has made finger limes of interest in both commercial and research contexts.
Other specialty citrus varieties play important roles in both fresh consumption and value-added products. Tangelos, for example, combine the sweetness of mandarins with the tannins of grapefruit (a reason my family has grown Minneola Tangelos in Redlands Heights since the variety was released in the 1930s), while Eureka lemons are widely used in culinary applications due to their high juice content, fragrant essential oils and balanced acidity.
California’s citrus diversity is supported by a long history of agricultural experimentation and participation from ethnically diverse labor sources, including introductions from Mediterranean, Asian, and Australian sources. For instance, Satsuma Mandarins are one of the many lasting agricultural contributions Japanese immigrants have made to California agriculture. Eureka Lemons arrived during the Gold Rush (hence the name, as they resembled gold nuggets) with Sicilian immigrants who were also responsible for bringing lemons to other places, such as Creole country in Southern Louisiana. Lisbon Lemons are a contribution from Portuguese and Azorean immigrants. Institutions and private growers alike have contributed to the development and dissemination of these varieties, often selecting for flavor, color, and adaptability to local conditions. UC Riverside alone has bred thousands of varieties of citrus, including many of the most renowned and preferred varieties you consume in grocery stores today. Little Cuties? Pixies? You name it.
Today, specialty citrus continues to expand in both availability and consumer interest. From farmers markets to specialty food products, these fruits offer alternatives to standard varieties and contribute to a broader understanding of citrus as a diverse and evolving category.
