Avocado The avocado (Persea americana) is a tree native to Mexico and Central America. It is colloquially known as the Alligator Pear, reflecting its shape and the leather-like appearance of its skin. The two most widely marketed avocado varieties are the rough-skinned, almost Black Hass and the smooth, thin-skinned green Fuerte. The Hass has a… Read More Calories in Avocado