varieties in coffee

Coffee comes from different origins, such as Guatemala, Colombia, Costa Rica, Ethiopia, Sumatra... and can taste different from origin to origin due to soil and weather conditions. Another factor that can affect the taste of coffee is processing methodology. Some coffee mills do what is call dry processing, which is a process where the coffee cherries are picked and laid out on large cement slabs to dry in the sun, and once dry the pulp is removed and the beans are dried again and then the husks are removed, leaving green beans ready for sale/export. There is also the method of wet processing where the coffee cherries are washed and dried several times to get the green beans. Another thing that can affect the taste of coffee is the grade. Specialty grade is the highest and must meet several requirements to make the grade. To answer your question specifically about varietals, there are several varietals/species of coffee such as Arabica and Robusta, but the coffee world has barely scratched the surface learning of all the different varietals. There are also several different bean types within varietals: Typica, Bourbon, Caturra, Catuai, catimor, and many more. Here is a great web site for learning about coffee: sweetmarias.com I hope this answer was helpful!