What is the Sudan Rume variety?

Sudan Rume is a wild-origin Coffea arabica variety collected on the Boma Plateau in what is now South Sudan. Introduced into international breeding programmes in the mid-20th century, it stands out for genetics highly divergent from the main cultivated Arabica gene pool and produces cups of exceptional aromatic intensity with a relatively low caffeine content.

Sudan Rume holds a singular place in coffee's genetic history. The variety was collected in the 1940s–1950s by British colonial botanists in the forests and savannas of the Boma Plateau, in eastern South Sudan near the Ethiopian border. This zone falls within the original cradle region of Coffea arabica — stretching from Ethiopia into South Sudan — and the collected plant represents an evolutionary branch distinct from the Bourbon and Typica lineages that dominate global coffee cultivation.

Genetically, Sudan Rume sits at considerable distance from standard commercial varieties. DNA analyses conducted in the 2000s and 2010s confirmed its placement in so-called 'basal' Arabica lineages — branches close to the species' evolutionary origin, before it diverged into major varietal families. This phylogenetic position makes it valuable material for resistance breeding (notably against the coffee leaf rust fungus Hemileia vastatrix) and for improving organoleptic quality.

In the cup, coffees produced from Sudan Rume or its crosses display an uncommon floral and fruity aromatic intensity, a light to medium body, and elegant acidity. Its caffeine content is naturally lower than the Arabica average (approximately 1.2–1.5 % vs. 1.5–1.7 %), contributing to a perception of lightness and refinement. A rare genealogical fact: Sudan Rume is one of the documented genetic parents of the Hibrido de Timor (HdT) variety, which itself spawned dozens of rust-resistant varieties such as Catimor and Sarchimor — establishing a direct lineage between a wild coffee tree from South Sudan and roughly half of the world's rust-resistant coffee plantations.

Today Sudan Rume is grown as a prestige variety on a handful of specialty farms, primarily in Panama (notably in Chiriquí province estates), Colombia, and a few experimental Ethiopian farms. Lots are rare, costly, and highly sought after by World Barista Championship competitors.

Sudan Rume: variety profile