These fruits are made up of:

            An outer layer called pulp.
            A sugary gluey substance called mucilage.
            A hard shell called skin or parchment.
            A thinner layer called silver skin.
            And finally, the bean or almond, which is the part of the fruit that once roasted and ground is used to produce               the beverage called coffee.



Varieties:

Coffee can be classified basically in two ways: according to species (type of bean) or according to origin.

a) Species:

Even though there are over 60 species of the coffee plant in the world, only two are largely grown for commercial purposes: arabica and robusta.

» Arábica || » Robusta

b) Origin:

According to its geographic origin, coffee may come from different production areas located between the tropic of Cancer and the tropic of Capricorn, in warm, humid climates suitable for its growth.
Central America and the Caribbean: Predominantly arabica variety, coffee grown on Mexico, Panama, Costa Rica, Guatemala and islands of the Caribbean is of a very high quality, representing a strategic resource for their economies.
South America: Brazil, with an annual production of 60,000,000 coffee sacks, is the worldwide leading producer, in a continent where there are other important producers like Colombia, second, and Ecuador and Peru; in all these countries the predominant variety is arabica.
Africa: At the heart of the warm, tropical area of the world, most of the countries in Africa produce robusta coffee, even though some areas of higher altitude in Kenya, Tanzania and Cameroon are suitable for the arabica variety.