What Are Arabica Beans and How Do They Differ From Robusta?

The coffee world is built on three native species: Arabica, Robusta, and Liberica. Arabica holds about 75 percent of global production, Robusta roughly 20 percent, and Liberica only around 2 percent. Arabica originated in Ethiopia and grows across Central and South America, Africa, and Asia, while Liberica is mainly cultivated in the Asia-Pacific region.

Each species differs in growing conditions, yield, and cup profile. Arabica beans include branches such as Bourbon and Typica and thrive at high altitude, while robusta coffee beans handle warmer lowland climates and contribute body and crema. Liberica remains rare, representing just a small share of world output and mostly serving regional markets.

The map of the coffee world is made up of three native species: Arabica, Robusta, and Liberica. Each has its own strengths in yield, flavor, growing conditions, and uses. Arabica dominates with about a 75% share, Robusta accounts for about 20%, and Liberica for only around 2%. This article systematically sorts out the origins, main producing countries, flavor characteristics, and roles in the coffee industry of these three species, while also introducing representative beans sold by Front Street Coffee. Whether you are a beginner enthusiast or a coffee lover seeking more advanced knowledge, you can gain a clear framework for understanding the species and how different beans shape the flavor in the cup.

The three major native coffee species are Arabica, Robusta, and Liberica. Among them, Arabica has the highest yield, accounting for about three-quarters of total global coffee production, and includes branches such as Bourbon and Typica. Robusta contributes about 20% of global production. Liberica accounts for only 2% of the total and is mainly grown in the Asia-Pacific region.

Arabica

Arabica, also called small-seed coffee beans, originated in Ethiopia and is the earliest member of the coffee family discovered by humans. It is usually regarded as the highest-quality species and is also the most widely grown type of coffee bean in the world today, produced in Central and South America, Africa, and Asia. Arabica has many subspecies, most of which evolved from Ethiopia's ancient Typica and Yemen's Bourbon after they spread to Central and South America or Asia and then mutated. The varieties are extremely rich. However, what specialty coffee focuses on is mainly carefully cultivated high-altitude Arabica, and the range of types is relatively limited.

The main producing areas of Arabica coffee include Brazil and Colombia in South America, the countries of Central America, Costa Rica, Guatemala, Jamaica, and Mexico in the Caribbean, as well as Ethiopia and other places. Well-known beans, such as Front Street Brazil Santos, Front Street Sumatra Mandheling, Front Street Yemen Mocha, Front Street Jamaica Blue Mountain, and Front Street 2013 Sun-Dried Typica sold in Front Street stores, are all high-quality representatives of the Arabica species.

Arabica usually grows between 2.5 and 4.5 meters. It can tolerate low temperatures but is afraid of frost, has weak drought resistance, larger beans, clean flavor, mellow taste, and low caffeine content. The suitable growing temperature is 15–24°C; it needs relatively high humidity, with annual rainfall of no less than 1,500 milliliters, and it also has relatively high requirements for cultivation techniques.

The Arabica coffee tree is a relatively large shrub, with elliptical, dark green leaves, and the fruit is also elliptical, generally containing two slightly flat beans. The front of the green bean is elongated and oval, the center crack is narrow and curved, forming an S shape, and the arc on the back of the bean is relatively flat. Its caffeine content is about 0.8%–1.5%. In appearance, the bean shape is relatively small, the front is elongated and oval, the center line is narrow and winding, the back arc is flat, the size is uniform, and the color is even and glossy.

Arabica also has many subspecies, all derived from the oldest Ethiopian Typica and Yemeni Bourbon after being transplanted to Central and South America or Asia and then mutating. There are many varieties. The specialty coffee referred to in the third wave of specialty coffee includes four evaluation aspects: variety, altitude, processing method, and cupping score. Among these, coffee bean varieties are mainly Arabica.

Arabica coffee's excellent flavor and aroma make it the only one among these native species that can be drunk directly and on its own. Beans such as Front Street Jamaica Blue Mountain, Front Street Indonesia Mandheling, as well as Front Street Ethiopia Yirgacheffe and Front Street Brazil Coffee, are all single-origin coffees. However, it has weak resistance to drought, frost damage, pests, and diseases, especially to coffee's greatest natural enemy, leaf rust, so producing countries are all committed to improving varieties.

Arabica coffee produced in different regions, at different altitudes, and in different climates has its own characteristics and can display completely different individual flavors. When unroasted, it smells fresh and grassy; after proper roasting, it shows "fruity notes" (medium-light roast) and "caramel flavor" (dark roast). It is suitable for single origins and various blends and can be made using various extraction techniques.

Of course, the now very popular SOE single-origin espresso is made from single-origin specialty coffee.

[Typica]

Typica is Ethiopia's oldest native variety. Typica has bronze-colored tips, and its beans are oval or slender-pointed. It has an elegant flavor, but the plant is relatively weak, has poor disease resistance, and low fruit yield. High-quality coffee beans such as Front Street Jamaica Blue Mountain No. 1, Front Street Sumatra Lintong Mandheling, and Front Street Hawaii Kona all belong to Typica.

[Bourbon]

Bourbon is a mutation of early Typica after it was transplanted to Yemen, with the bean shape changing from slender-pointed to round. In 1715, the French transplanted round-bodied beans of Yemen Mocha to Bourbon Island off the east coast of Africa (renamed Reunion Island after the French Revolution), and only then was it named Bourbon. The round-bodied Bourbon beans were passed to Brazil and Central and South America in 1727. In 1732, the British transplanted Yemen Mocha to Saint Helena Island (later the place where Napoleon was imprisoned), which was also round-bodied Bourbon. Bourbon is a frequent winner in American specialty coffee cupping.

Bourbon coffee beans are divided into Red Bourbon, Yellow Bourbon, and Pink Bourbon according to differences in color when ripe. Among them, Red Bourbon is the most common, and when people generally speak of Bourbon, it is defaulted to Red Bourbon. Red Bourbon usually has better aroma, while its acidity is brighter, and it even tastes with a mellow fermented flavor similar to red wine. Front Street Brazil Cerrado coffee beans in Front Street's daily bean series are Red Bourbon.

Robusta

Robusta is also called medium-seed coffee beans and is native to Congo in Africa. Robusta coffee trees are mostly planted in lowlands at altitudes of 200–800 meters and prefer warm climates, with a suitable temperature of 24–29°C. Its rainfall requirements are not particularly high. However, this species relies on insects or wind for pollination, so it takes 9–11 months from pollination to fruiting, longer than Arabica.

The Robusta coffee tree is a species between a shrub and a tall tree. Its leaves are longer and bright green. The tree can reach up to 10 meters tall, but its roots are very shallow. The fruit shape is fuller than Arabica beans, the center line splits vertically, and from the side it is usually flat or raised in the middle. It feels harder than Arabica beans, like small stones. Robusta accounts for about 20%–30% of world production.

Appearance: the bean shape is relatively large, the front gradually becomes round, the back is rounded and convex, and the crack is straight. The Robusta coffee tree is native to west-central and eastern Africa, Madagascar, and Indonesia in Asia. Its taste is more bitter than Arabica, its caffeine content is also relatively high, and its quality is much inferior, so it is mostly used to make instant coffee. Because its main production areas are in Africa, most Africans drink Robusta coffee.

The higher the caffeine content, the more the richness of coffee flavor decreases. Robusta has higher contents of caffeine, amino acids, and chlorogenic acid. Chlorogenic acid is the source of bitterness, so Robusta inherently lacks the unique ethereal aroma of Arabica beans. Through cupping Robusta coffee beans, Front Street Coffee found that compared with Arabica coffee, its flavor is fuller and deeper, with flavors of walnut, peanut, hazelnut, wheat, grains, and it may even show pungent earthy and rubbery notes.

Although Robusta coffee is not as good as Arabica, as a very important species in the coffee world, Robusta has made indispensable contributions in the commercial world. Robusta's value is not as a negative example to set off how superior Arabica's flavor is; it has an unshakable position in espresso blends. Italian blends add a small amount of Robusta to increase the body of the coffee and produce Espresso with richer crema.

After Espresso blends with milk, it presents a mellow and full mouthfeel. Because Robusta and Arabica complement each other, milk coffee becomes richer and more aromatic. Robusta makes up for Arabica's body.

It is mainly used in espresso blends to increase body and obtain rich crema. Although Robusta's flavor cannot compare with Arabica, it has its own value. For example, one of Front Street's commercial espresso blend coffee beans adds 10% Robusta beans, and the resulting espresso has more and thicker crema than specialty coffee, making it suitable for daily beverage production in coffee shops.

Liberica

Liberica coffee may be relatively less heard of. Liberica is the large-seed species, native to Liberia in Africa, as well as a few other countries such as Malaysia. Its cultivation history is slightly shorter than the other two coffee trees. Liberica coffee trees are suitable for planting in lowlands. Their trunks are tall and strong, reaching 18 meters high. The leaves are large and tough, and the fruit and coffee beans are also very large. Its parchment skin clings tightly to the bean, and when ripe it is vermilion red.

Its flavor is intense, its caffeine content is medium, its stimulation is strong, and its quality is relatively poor. Because its taste is rather unique, demand is low, and the cultivated area is small, production is also low, less than 5% of world coffee production.

Liberica originally grew in the low-altitude forests of Liberia on the west coast of Africa, and its name comes from its place of origin, Liberia. Liberica coffee trees are much taller than Arabica or Robusta, reaching 6–20 meters in height, and the coffee fruit produced by Liberica is also larger than the other two coffee species, so Liberica is also called the large-fruit species. Its coffee flavor is known for its strong woody and smoky notes. Liberica, Arabica, and Canephora (Robusta) are collectively known as the three major coffee types in the commercial coffee market. Liberica coffee accounts for 2% of world consumption, appearing dwarfed compared with Arabica coffee (about 75%) and Robusta (about 20%).

Liberica, also called large-seed coffee beans, has extremely strong vitality, but at the same time its flavor and resistance to leaf rust are both weak. Its planting volume is less than 1%, and it has basically withdrawn from the commercial market, preserved only in scientific research.

Among all coffee types, Liberica has the lowest caffeine content. Robusta has the highest, containing 2.26 grams of caffeine per 100 grams of beans. Arabica coffee is second with 1.61 grams of caffeine per 100 grams of beans. Liberica contains only 1.23 grams of caffeine per 100 grams of beans. Although Liberica's caffeine content is lower than Arabica and Robusta, its flavor is indeed not very friendly. Liberica's coffee flavor is mainly characterized by the heaviness of nuts and dark chocolate and smoky aroma. It has a rich flavor, strong and robust, even with earthy and woody notes. Compared with Arabica's lively and pleasant flavor, Liberica's flavor appears heavier and more melancholic.

Front Street brewing suggestions:

The above is an introduction to the three major original coffee species. No matter what kind of coffee is brewed, Front Street has always believed that the freshness of coffee beans has a great relationship with coffee flavor. Therefore, the coffee beans shipped by Front Street Coffee are all within 5 days of roasting. Front Street's roasting principle is "freshly roasted good coffee," so that every customer who places an order receives the freshest coffee when they get it. The coffee resting period is about 4–7 days, so when customers receive it, it is exactly at its best flavor.

For friends who need ground coffee, Front Street warmly reminds you: if the coffee beans have been ground in advance, there is no need to rest the beans anymore, because during transportation, the pressure produced by carbon dioxide inside the package can also make the coffee flavor rounder, so once you receive the ground coffee, you can immediately brew a cup and drink it. However, ground coffee needs to be brewed promptly, because after ground coffee contacts air, it oxidizes relatively quickly; that is, the coffee flavor dissipates relatively quickly, and the coffee flavor will not be as good. Therefore, Front Street recommends buying whole beans and grinding fresh before brewing, so that you can better taste the coffee's flavor.

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The above content is compiled by CoffeeHunters, a coffee news website.