I love to eat an onion even though its close relatives are garlic and shallot
I like onions, only cooked or in certain dishes. But, not only raw and alone.
It's wild original form is not know which I find very interesting
That is, I'm surprised we haven't determined the location, as we have in most vegetables. 
They do have blueish-green leaves when grown. The base of the onion also swells when a certain length is reached
I also enjoy the green onions, they are great in salads and other dishes. 
I agree! A tidbit about green onion. A fun tidbit there is a blues song called "Green onions" that is one of the most popular instrumental rock and roll songs ever