Scallions
Scallions is an aromatic herb ingredient used for fresh, green flavor. Add tender leaves late when you want a brighter aroma, or cook sturdier parts only when their flavor fits.
Identity
Leafy herb
Handle tender leaves gently.
Fresh leafy herbs lose aroma with long heat. Chop them close to use, add tender leaves late, and save stems or tougher leaves for longer cooking only when their flavor fits.
Wikimedia Commons
Reference image
Scallions reference image.

Source: Wikimedia Commons
Used In Recipes
Substitutions
Acceptable
Spring Onions -> Scallions
4 spring onions or scallions (chopped)
The source lists this as an alternative in the same ingredient row.
Source: How to Make a Frittata