Chives
Chives is an aromatic herb used for fresh, green flavor. Add tender leaves late when you want a brighter aroma, or use 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 keep stems or tougher leaves for longer cooking only when their flavor fits.
Wikimedia Commons
Reference image
Chives reference image.

Source: Wikimedia Commons
Used In Recipes
Substitutions
Acceptable
Chives -> Green Onions
¼ cup (⅔-ounce) chives or green onions (mostly green parts), cut into ¼-long pieces
The source lists this as an alternative in the same ingredient row.
Source: Best Stuffed Shells
Acceptable
Tarragon -> Chives
¼ cup chopped tarragon or chives
The source lists this as an alternative in the same ingredient row.
Source: How to Make a Frittata