Scott Laboratories (SL) created this native Kenyan coffee variety in the 1930s. Botanists at the institute searched for different mutations of French Mission (a.k.a. Bourbon), Mocha and Yemeni Typica which they began to crossbreed with the hope of finding high quality, high yielding and disease resistant strains. SL28 is one of these spawns although yield is quite small. It has a copper colored leaf and produces broad bean sizes. Some believe both Sudanese and Ethiopian strains influence this variety. The cup result can be intensely citric, sweet, balanced and complex in flavor.