Almost all the world's coffee is arabica or robusta. A third species, Coffea liberica, makes up less than 1.5% of commercial production. It had its chance in the late 1800s and lost. Now researchers and roasters are looking at it again, mostly at one of its forms, excelsa. A Big Tree With Big Beans Liberica is native to western and central Africa, from Liberia to Uganda and … [Read more...] about Liberica and Excelsa: Why the Coffee Species That Failed a Century Ago Is Back