Catnip (Nepeta cataria) is a member of the mint family and grows wild throughout the world. Catnip is best harvested when in flower as the        volatile oils in catnip exude a strong musky aroma. Catnip is a cooling,      relaxing plant making it useful for times of nervous tension.

Having originated in Italy - it's been know for it's calmative effects on animals and humans. Further studies show it's benefit for pains & mood balance.