There's a website called TimeTree that let's you find the age of the nearest common ancestor of any two species. I plugged in “Persea americana” (avocado) and “Pistacia vera” (pistachio). I found the Latin names in the Wikipedia. read more
Avocados are related to Laurels such as Bay Trees, Indian Cinnamon, Cassia Cinnamon and Camphor Laurel. family: lauraceae Pistachios are related to Mangos and Cashews and Sumac. read more
So Sayer needs to move on from lemons, and he’s settled on avocados. From a climate perspective, the leather-skinned fruit are a risky choice. Avocado trees like their surroundings not too hot and not too cold, and they always need water. read more