Coffea arabica var. Mokka-do

The term 'Mokka' in the context of Coffea arabica refers to a specific botanical variety characterized by its diminutive, rounded seeds that often resemble split peas. Unlike the broader historical usage of 'Mocha'—which historically served as a trade name for coffee exported through the Yemeni port of Al-Makha—the botanical variety Mokka is a distinct genetic entity. It is formally recognized in taxonomic literature, such as the records of P.J.S. Cramer, as a variety of the Arabica species.

Botanically, the Mokka tree is distinguished by a bushy growth habit, narrow leaves, and small cherries. These physical traits are consistent with its classification as a mutation of the Bourbon variety. Because of its unique morphology, the variety has been studied and cultivated in various research settings, including the College of Tropical Agriculture and Human Resources (CTAHR) research station in Hawaii, which has served as a repository for various coffee cultivars.

Much of the confusion surrounding Mokka stems from the conflation of the botanical variety with the historical port of trade. While the port of Mocha was the primary gateway for coffee exported from Yemen for centuries, the coffee shipped through that port was not exclusively of a single genetic variety. Consequently, the name 'Mokka' has been applied both to a specific, small-seeded cultivar and to a generic marketing term for coffee from the Arabian Peninsula, leading to significant historical ambiguity.

In modern agricultural practice, the Mokka variety is noted for its low yield and small bean size, which can present challenges for farmers and processors. The small seeds require specialized handling during harvesting and milling to ensure uniformity. Despite these logistical hurdles, the variety remains of interest to specialty coffee producers who value its unique phenotype and the distinct sensory profiles it can produce under favorable conditions.

For roasters, the Mokka variety requires careful attention due to the small, dense nature of the beans. The physical size of the seed influences heat transfer during the roasting process, necessitating adjustments to standard profiles to avoid uneven development. When roasted correctly, the variety is often prized for its aromatic complexity and unique cup characteristics, which differentiate it from more common, larger-seeded varieties like Typica or Caturra.

Today, the status of Mokka is well-understood within the scientific community as a Bourbon-derived mutation rather than an ancient, mysterious landrace. Its presence in modern specialty coffee is largely a result of its preservation in research collections and subsequent commercial cultivation in regions like Hawaii. Understanding Mokka requires separating the romanticized history of the Yemeni trade from the concrete, documented reality of its genetic lineage and physical characteristics.