Lavender Botanical name: Lavandula spica Lavender is also called as Nardus by the Greeks. All lavender varieties have flowers which contain a richly perfumed. Benefits and uses: Lavender oil beneficial in a variety of conditions, including insomnia, hair loss, anxiety, stress, and postoperative pain, It used for restlessness, insomnia, nervousness, and depression oil used by herbalists to treat skin ailments, like fungal infections, wounds, acne.