Which Species and Varieties Built Specialty Coffee?
Over a hundred varieties exist under the Coffea genus, and the world's most commonly cultivated coffee species are Arabica and Robusta. Arabica, with its layered flavor, anchors specialty coffee and supplies cafes and the high-end market, while Robusta carries rougher flavor and more caffeine, going mostly into instant coffee and espresso blends.
Ethiopia's Typica and Yemen's Bourbon are regarded as the oldest varieties, and most Arabica lines descend from them. Typica shows bronze top leaves and slender oval beans with elegant flavor but low yield and weak disease resistance; Bourbon turned the bean shape round, and after French growers moved Yemen Mocha to Bourbon Island in 1715, further mutations such as Bourbon Pointu, Maragogype, Geisha, Caturra, Pacas and Pacamara appeared.
The coffee world boasts a vast array of varieties, but what truly laid the foundation of specialty coffee are those ancient native species and their derived mutations. Starting from the classic SCAA classification, this article traces the origins of the two elder varieties, Typica and Bourbon, along with their representative offspring born from natural mutations and artificial hybridization—from Bourbon Pointu, Maragogype, and Geisha to Caturra, Pacas, and Pacamara. The article not only introduces the bean characteristics, flavor profiles, and cultivation traits of each variety, but also reveals the inseparable relationship between genetic mutations and regional conditions, helping coffee enthusiasts build a systematic understanding of varieties.
Over a hundred varieties have been discovered under the Coffea genus, with Arabica and Robusta being the most commonly encountered. Arabica has a distinctive character and rich flavor layers, making it the core pillar of specialty coffee, mainly supplied to cafés and the professional high-end market; Robusta, on the other hand, has a rough flavor and higher caffeine content, falling outside the specialty coffee category, and is mostly used in instant coffee production and espresso blends.
Ethiopia's Typica and Yemen's Bourbon are currently recognized as the oldest coffee varieties. After these two native species were introduced to Central and South America and Asia, they gradually evolved into numerous Arabica variants. The small-bean coffee grown in Yunnan, China, is one of Typica's mutated descendants; other producing regions also have no shortage of Bourbon variants.
The following explains the two major systems of Typica and Bourbon:
Typica: The oldest native species originating from Ethiopia; it can be said that all Arabica traces back to Typica. Typica's top leaves are bronze-colored, and its beans are oval or slender-pointed; the flavor is elegant, but the tree is weak in vigor, lacks disease resistance, and yields low. Well-known estate beans such as Jamaica Blue Mountain, Sumatra Mandheling, and Hawaii Kona all belong to the Typica family.
Bourbon: A variant produced after Typica was introduced to Yemen in the prehistory of coffee, with the bean shape changing from slender-pointed to rounded. In 1715, the French transplanted the round-bodied beans of Yemen Mocha to Bourbon Island off the east coast of Africa (renamed Reunion Island after the French Revolution), from which the name Bourbon derives. In 1727, round-bodied Bourbon beans made their way to Brazil and Central and South America; in 1732, the British introduced Yemen Mocha to St. Helena Island (the place where Napoleon was later imprisoned), which was likewise round-bodied Bourbon. In American specialty coffee cupping competitions, Bourbon is a frequent champion.
The bronze-colored top leaves of Typica are one of its characteristics
Genetic mutations
Bourbon Pointu: Discovered on Bourbon Island in 1810, its beans changed from round to pointed, and its caffeine content is only half that of ordinary varieties; however, its yield is scarce and the tree is frail, making it extremely precious (mostly cultivated in laboratories).
Maragogype (also known as Elephant Bean): The most famous variant of Typica, first discovered in 1870 in the Maragogype producing area of Bahia state in northeastern Brazil; its beans are at least three times larger than ordinary Arabica, hence the name. Maragogype has poor flavor in low-altitude regions, but when grown at high altitudes its flavor is superior, with soft acidity and pleasant sweet aroma.
Geisha: A derivative variety of the Typica family, exported in 1931 from Geisha Mountain in southern Ethiopia (Geisha is homophonous with the Japanese word for "geisha"), after which it passed through many countries without distinction, was introduced to Panama in the 1960s, and only began frequently winning cupping competitions in 2005.
Kenya's "SL28" and "SL34": Bourbon direct descendants selected and bred in Kenya by French and British missionaries and researchers in the early twentieth century. Over a century they have adapted to Kenya's high-concentration phosphoric acid soil, creating Kenya's signature acidic aroma sprite; top Kenyan coffees all come from these two varieties, but when introduced elsewhere they lose their flavor.
Yellow Bourbon (Bourbon Amarello, or Yellow Bourbon): A Bourbon variant unique to São Paulo state, Brazil; the fruit does not turn red when ripe but instead turns orange-yellow. It was later discovered that other local Bourbon-derived varieties also exhibit yellowing of the fruit skin.
Caturra: A single-gene mutation of Bourbon, discovered in Brazil in the 1950s. Its tree vigor and disease resistance are superior to Bourbon, and it does not require shade trees; its flavor is comparable to or slightly inferior to Bourbon.
Pacas: A Bourbon variant discovered in El Salvador. In 1935, Salvadoran coffee farmer Pacas introduced the renowned Bourbon, and by 1956 he found that its yield was higher than other coffee trees of the same species; after expert verification, a genetic mutation was confirmed.
Villa Sarchi: A Bourbon variant first discovered in Costa Rica in the 1960s, frequently appearing on outstanding cupping lists in recent years.
From left to right: Kenya Peaberry, Maragogype, Kenya AA
Intraspecific Hybrid (Arabica)
Mundo Novo: A variety naturally hybridized from Bourbon and Sumatra Typica, first discovered in Brazil. High-yielding and resistant to pests and diseases, it was widely planted in Brazil in the 1950s and hailed as the new hope of the Brazilian coffee industry; however, the tree is relatively tall, making harvesting inconvenient.
Catuai: A cross between Mundo Novo and Caturra; the tree is short and wind-resistant, but its flavor is rather monotonous.
Pacamara: A hybrid of Pacas and Maragogype; its beans are large, second only to Maragogype. It is a fine variety bred in El Salvador in the 1950s, and its cupping results in recent years have been impressive.
Kent: A Typica hybrid variety discovered in India; high-yielding and strongly disease-resistant, but it has never achieved good results in cupping.
Interspecific Hybrid (Arabica × Robusta)
Timor: A natural hybrid variety discovered in East Timor, with 44 chromosomes, closer to Arabica; but its flavor is plain and unremarkable.
Catimor: In 1959, the Portuguese crossed Brazilian Caturra with Timor to breed the strongly disease-resistant Catimor. However, its flavor is also relatively poor, and it is currently an important variety for commercial beans.
Icatu: A variety improved through multiple generations of hybridization in Brazil, which once entered the top ten of Brazil's "Cup of Excellence."
Ruiru 11: A hybrid variety developed in Kenya in 1985 that emphasizes yield over quality. Of the varieties hybridized from Arabica and Robusta, none so far can be considered specialty coffee; therefore, many suppliers specializing in freshly roasted specialty coffee, such as fresh and others, do not carry these varieties. However, many suppliers—even those importing renowned coffees—mix such hybrid beans into their blends to reduce costs. From the above genetic mutations (whether natural or the product of research), their flavors are greatly related to specific regional conditions. Even within the same country, coffee beans from different estates may differ vastly. For example: Jamaica's national treasure, the Wallenford Estate Blue Mountain, is more than twice as expensive as Jamaica Prime Highlands Blue Mountain.
The above content is compiled by CoffeeHunters, a coffee news website.
