Genus Coffea refers to a group of coffee plants that belong to the family Rubiaceae. Coffea is a tropical plant native to Africa, and it is cultivated widely for its coffee beans. There are several synonyms for the word Genus Coffea, including coffee tree, coffee plant, and coffee shrub. The term coffee tree is often used to refer to Coffea Arabica, which is the most common type of coffee plant. Coffee shrub is used for Coffea Canephora, which is less common but more robust in flavor. The term coffee plant encompasses all species of Coffea, including robusta, Arabica, and others. These synonyms all refer to the same family of plants which produce the beloved caffeinated beverage enjoyed throughout the world.