The wild oregano usually referred to by cooks is not the same as various plants called “wild oregano” in North America.
It is the herb whose scientific name is “Origanum syriacum”, aka “Origanum maru.”
It is a perennial, though it is not cold hardy and can’t stand frost. It grows 1 to 2 feet (30 to 60 cm) tall, and produces stalks with tightly clustered buds, that then open into small white flowers.
The the buds can be harvested before they open, and be dried. They have a very strong, concentrated flavour.
Wild oregano has a much stronger oregano taste than regular oregano.
It can be used dried or fresh.
It is used in making Zatar.