Elsewhere
Originally published in the Journal de Montréal on August 21, 2010.
Green onions, scallions, shallots… What do you call these aromatic plants that belong to the same large family of approximately 500 plants, the best known of which are onions, leeks, garlic and chives?
But it shouldn’t be hard to distinguish between shallots and scallions.

scallions
It is widely believed that the green onion – from the species ‘Allium fistulosum’ – comes from northern China and it was probably domesticated at the start of the Christian era.

shallots
Legend has it the Crusaders discovered shallots in this place and they brought it back with them.
A few of our recipes that feature shallots:
A few of our recipes that feature scallions:

Very informative, helpful and lucidly explained.
So when should we use shallots vs scallions?
They are 2 different vegetables as explained in the post.