Also called citronella, the “elixir of life” with a sweet, lemon-scented taste has for many centuries been well-known for its effectiveness against depressive conditions, anxiety, nervousness, sleep disorders and palpitations. Ongoing research is examining its action on herpes and the thyroid. Also ideal for digestive disorders related to anxiety as a result of its carminative and anti-flatulent properties. It is also anti-spasmodic. Thirst-quenching in the summer, melissa (from the Greek for bee) has properties close to those of royal jelly and honey.