Culantro - Chinese Corriander
Profile
Ngo gai Culantro is also known as Mexican coriander, thorny coriander, spiny coriander, fit weed, saw leaf or saw tooth herb. The herb has a stronger of coriander flavour. 
Usage and cultural significance
Ngo Gai is typically used with or instead of coriander as a savoury addition to soups, curries and noodle dishes in Vietnam, Malaysia and Thailand.
Ngo Gai sometime is used to treat pneumonia, flu, digestive issues and fever.