Coffee Beans: The Many Varieties of the Coffee Plant

Walk up to the counter of any serious roaster these days and the menu reads like a wine list. Bourbon. Gesha. SL-28. Pacamara. A barista in a Lviv roastery I like once spent ten minutes explaining why two bags from the same Colombian hillside tasted like different drinks, and the whole answer came down to one word: variety. Not the country, not the roast level. The actual cultivar of the plant in the ground. For most of coffee history you only needed to know one thing about your beans, whether they were Arabica or Robusta. That stopped being enough a long time ago.

The hundreds of named coffee varieties out there look like chaos until you realize almost all of them are cousins. Nearly every great Arabica on that menu traces back to two ancestors. Once you can see the family tree, the whole thing makes sense. So here is the tree.

Two species, and why everyone forgets one of them

There are really only two coffee species that matter in your cup: Arabica and Robusta. Arabica is the delicate one, full of nuance and acidity, fussy about altitude and climate, and prone to disease. Robusta is exactly what the name says, hardy and high-yielding, with a flatter, more bitter cup and nearly double the caffeine. Supermarket marketing trained everyone to read “100% Arabica” as a badge of quality, and broadly that holds, though good Robusta has its place, especially in espresso and traditional Vietnamese coffee. I get into that whole rivalry in the piece on Arabica versus Robusta. Everything else on this page lives inside the Arabica family, which is where the interesting genealogy starts.

The two mothers: Typica and Bourbon

Coffee began in Ethiopia, and Ethiopian coffee is still its own universe. There are thousands of heirloom varieties growing wild and on small farms there, many of them never formally catalogued, which is why a washed Yirgacheffe and a natural Harrar can taste like they came from opposite ends of the earth. You can read more about those origins in the guide to where coffee comes from. When coffee left Ethiopia and Yemen and spread across the world, almost all of it descended from one base type: Typica, the original migrant that carried coffee to the Americas.

Then, on a French-held island in the Indian Ocean called Bourbon, now Réunion, French missionaries cultivated a natural mutation of Typica that produced more cherries and a sweeter, brighter cup. That was Bourbon (say it “bor-BONN”). Bourbon spread through the French colonies across Africa and the Americas and became the mother of an enormous share of the varieties grown today. So that is the trunk of the tree: Typica on one side, its daughter Bourbon on the other. Almost everything below grew from one of those two, with a fair amount of cross-breeding tangling the branches together.

The Typica side of the family

Maragogype (mara-go-HEE-pe) is a Typica mutation from Brazil famous for one thing: enormous beans, which earned it the nickname Elephant Bean. The cup is heavy and buttery with citrus and floral hints. Mocca/Mokha, not to be confused with the chocolate drink, is a tiny-beaned Typica-Bourbon mutation from near Harrar, Ethiopia, now grown in Yemen and Hawaii, with a pronounced natural chocolate note.

Kent was developed on a Mysore, India estate in the 1920s for resistance to coffee leaf rust, lighter-bodied than most Indian coffee with floral and spice notes. Jember (also called S795) is its Indonesian descendant, bred for hardiness in the 1940s and carrying the classic Indonesian profile of heavy body and maple-brown-sugar sweetness. Pache, a Guatemalan Typica mutation, is smooth and flat enough that it earns its keep mostly as a blender.

Jamaican Blue Mountain is both a place and a Typica strain, one of the first coffees grown in the New World, prized for a light, balanced, mild cup. A warning worth keeping: the Blue Mountain name can legally go on any coffee from that Jamaican region, and not all of it is the actual JBM strain, so the name alone is not a guarantee. Kona Typica tells a similar story in Hawaii, where Typica thrives and farmers often grow it alongside Red Caturra and others. If you have ever wondered how honest a “Kona” label really is, I dug into exactly that in the Kona authenticity piece. Finally, Villalobos, a Costa Rican Typica mutation, handles poor soil and high elevation while delivering outstanding sweetness and fine acidity.

The Bourbon side of the family

Caturra is the big one, a natural Bourbon mutation found in Brazil in 1937 that struggled in the lowlands but flourished at altitude in Colombia and Central America, giving a light-bodied cup with bright, citric acidity. It became a mother strain in its own right. Its children include Catuai, a 1950s-60s Brazilian cross of Caturra and Mundo Novo that comes in red and yellow forms and shows that classic bright-but-sweet Brazilian character, and Maracaturra, a cross with Maragogype that produces a big bean with complex acidity and ripe fruit.

El Salvador contributed two beauties. Pacas is a natural Bourbon mutation that keeps Bourbon’s balance of sweetness and acidity while yielding more and doing well at elevation. Cross Pacas with the giant Maragogype and you get Pacamara, born in El Salvador in 1958, a remarkably balanced cup with sweet acidity, floral notes, and citrus. Villa Sarchi, a Costa Rican Bourbon mutation, takes very well to organic farming and offers medium body with intense fruit. Jackson, a Bourbon variety grown in Rwanda and Burundi, tastes like Bourbon with an extra delicate acidic edge, part of why those two countries have built a serious reputation. Mundo Novo, a natural Typica-Bourbon hybrid, is a heavy, disease-resistant producer that needs coaxing with good soil to overcome a slightly bitter streak, and it sits behind a lot of Brazilian coffee.

Then there is Kenya. SL-28 and SL-34 are the famous selections from Scott Laboratories, and together they make up the large majority of Kenya’s exports. They are the genetic reason Kenyan coffee tastes the way it does: fruit-and-wine flavors, long sweet finishes, the “blackcurrant bombs” that wine people lose their minds over.

The disease fighters: when breeders crossed in Robusta

Coffee leaf rust has wiped out entire regions, so breeders kept trying to borrow Robusta’s toughness without inheriting its harshness. The results are a mixed bag. Timor is the original Arabica-Robusta hybrid, disease-resistant but widely judged inferior because of those Robusta flavors. Catimor, a Caturra-Timor cross, gets the same criticism, though well-grown, well-processed strains in India, El Salvador, and Nicaragua can overcome the sourness. Icatu, a Catimor recrossed back with Arabica, does noticeably better in the cup, especially dry-processed, showing plum, berry, and chocolate. Ruiru 11 was Kenya’s attempt at a rust-proof wild Arabica, and while the plant is tough, its flavors never quite lived up to the SL standard, the Robusta in its DNA showing through.

The superstar: Gesha

Every family has one member who became famous. Gesha (sometimes spelled Geisha) originates near the Ethiopian town of Gesha, but it made its name in Panama. In 2007, a Gesha from Hacienda Esmeralda stunned the judges at the Panamanian Cup of Excellence with its layered, almost tea-like complexity and silky body, took top honors, and has been smashing auction records ever since. It is now one of the most prized and most expensive coffees on earth. If you ever see it on that wine-list menu and the price makes you blink, that is why.

You do not need to memorize all of this to enjoy a good cup. But the next time a bag says Bourbon or Caturra or SL-28 instead of just “100% Arabica,” you will know you are holding a specific branch of a very old tree, one that traveled out of Ethiopia, mutated on a French island, and scattered across every mountain in the coffee belt. If you want to taste the difference for yourself, the single-origin coffees worth seeking out are the place to start.

Last reviewed June 2026. Variety lineages are simplified; cross-breeding means many cultivars draw from both the Typica and Bourbon lines.