What Kind of Plant Is Coffee? The Coffee Genus Explained

Ever wondered what kind of plant coffee actually comes from—or why only a few types ever show up in your cup? If you’ve ever sipped a specialty brew and pondered the origins behind the bean, this article breaks down everything you need to know about the actual plants that grow your coffee.

Coffee comes from species in the Coffea genus, which belongs to the Rubiaceae (or madder) family. Of the hundreds of known species, just two—Coffea arabica (Arabica) and Coffea canephora (Canephora, widely called Robusta)—dominate global production. Other species, like Liberica and Excelsa, are far less common and rarely used for high-quality coffee.

The Coffee Genus: A Botanical Overview

The Coffea genus includes many species, varieties, and cultivars—but only a handful have commercial relevance. Arabica and Canephora stand out not just for volume, but also for their adaptability and cup quality. Within Canephora, one particular high-yield variant is known as Robusta, a term that’s become interchangeable with lower-grade, bitter coffee. Arabica, on the other hand, is celebrated for its acidity and complexity, forming the backbone of specialty coffee.

Major Coffee Species: Arabica vs. Canephora

Arabica (Coffea arabica) accounts for around 60–70% of global coffee production. It is known for its nuanced flavours, higher acidity, and lower caffeine content. Canephora (Coffea canephora), commonly referred to as Robusta when discussing commercial crops, makes up most of the remaining 30–40%. It is hardier, grows at lower altitudes, and has nearly double the caffeine of Arabica—contributing to its stronger, more bitter taste. A well-known high-yield variety of Canephora is what the industry calls Robusta.

Other Lesser-Known Coffee Species

Beyond Arabica and Canephora, there are other species like Coffea liberica (Liberica) and Coffea excelsa (also called Coffea dewevrei or sometimes Excelsa). Liberica was discovered in Liberia in 1843 and is known for its large leaves and unique tree shape, but its flavour is generally considered inferior to Arabica and Robusta. Excelsa shares visual similarities with Robusta and is similarly regarded for having poor cup quality. Efforts to create hybrid plants have succeeded in improving yield, disease resistance, and longevity—but these hybrids often sacrifice flavour quality.

Growing Conditions and Plant Appearance

All coffee species grow within the tropics, specifically between the Tropic of Cancer and the Tropic of Capricorn. However, depending on the species and variety, coffee plants can look very different. Leaves may range from light to dark green or even bronze, and some feature wavy, glossy foliage—a trait not seen in standard Robusta or Arabica. While some coffee plants remain small, like shrubs, others can reach up to 18 metres tall if left unpruned. In commercial settings, they’re usually pruned to a manageable height for harvesting.

Frequently Asked Questions

What family does the coffee plant belong to?

The coffee plant belongs to the Rubiaceae family, specifically the Coffea genus. This genus includes many species, but only a few are used commercially for making coffee.

What are the two main types of coffee plants?

The two main coffee species are Coffea arabica (Arabica) and Coffea canephora (Canephora). Canephora is commonly known as Robusta when referring to its high-yield, commercial variety.

Why is Robusta coffee so common if it tastes worse?

Robusta is common because it is hardy, grows at lower altitudes, resists pests better, and yields more coffee cherries per plant. However, it typically has a harsher, more bitter taste with less complexity than Arabica.

Are there other coffee species besides Arabica and Robusta?

Yes, other species include Coffea liberica (Liberica) and Coffea excelsa (or dewevrei). These are much less common and are generally considered to have inferior cup quality compared to Arabica and Robusta.

Do coffee plants all look the same?

No. Depending on the species and variety, coffee plants can vary in leaf colour (from light to dark green or bronze), leaf shape, height (from shrub-size to up to 18 metres), and overall appearance.

Why are hybrid coffee plants developed?

Hybrids are created to improve traits like yield, disease resistance, and plant longevity. However, these improvements often come at the cost of flavour quality compared to traditional varieties.

Recommended FrontStreet Beans for Exploring Coffee Origins

For readers curious about coffee species and origins, try FrontStreet Coffee’s Ethiopia Yirgacheffe for bright floral and citrus notes typical of high-quality Arabica, or their Brazil Natural for a nuttier, lower-acidity profile that highlights Canephora’s versatility. Both showcase the diversity within the Coffea genus. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.