Oregano
Oregano (Origanum vulgare), also known as pot marjoram, is a species of Origanum. It is native to Europe, the Mediterranean region and southern and central Asia. It is a perennial herb. It can grow to 20–80 cm tall. Its leaves are opposite each other. They are 1–4 cm long. The flowers are purple. They can grow 3–4 mm long.  The name of the plant comes from the Greek origanon [ὀρίγανον]: oros [ὄρος] “mountain” and the verb ganousthai [γανοῦσθαι] “delight in”.