There are two main species of the coffee plant, Coffea arabica being the older
one. Thought to be indigenous to Ethiopia, arabica was first cultivated on
the Arabian Peninsula. While more susceptible to disease, it is considered
by most to taste better than the second species, Coffea canephora (robusta).
Robusta, which contains about 40-50% more caffeine, can be cultivated in environments
where arabica will not thrive. This has led to its use as an inexpensive substitute
for arabica in many commercial coffee blends. Compared to arabica, robusta
tends to be bitter and has little flavor, with a telltale "burnt rubber" or "wet
cardboard" aroma and flavor. Good quality robustas are used as ingredients
in some espresso blends to provide a better "crema" (foamy head),
and to lower the ingredient cost. In Italy many espresso blends are based on
dark-roasted robusta.
Arabica coffees were traditionally named by the port they were exported from,
the two oldest being Mocha, from Yemen, and Java, from Indonesia. The modern
coffee trade is much more specific about origin, labeling coffees by country,
region, and the producing estate.

Coffee