Lavandula (common name lavender) is a genus of 39 known species of flowering plants in the mint family, Lamiaceae. It is native to the Old World and is found from Cape Verde and the Canary Islands, Europe across to northern and eastern Africa, the Mediterranean, southwest Asia to southeast India. The English word lavender is generally thought to be derived from Old French lavandre, ultimately from the Latin lavare (to wash), referring to the use of infusions of the plants. Although not commonly considered an allergenic substance, if you are susceptible from allergens in the mint family, you could experience negative side effects from lavender as well.
Flavour / Look.
Very pleasant taste with a green colour.
http://www.livestrong.com/article/252384-what- are-the- benefits-of- lavender-tea/