Spikenard (Nardostachys jatamansi) grows in the Himalayas at approximately 3000 meter high.
It is a great treat for insomnia and can treat anxiety, depression and stress and more over a great immune system booster.
"This oil consist primarily of sedative components. It contains only sesquiterpenoids, such as valeranol, vale renal, and especially valeranone, which are responsible for sedative effect.
The external application of the oil, rubbed over the heart or the solar plexus, provides the desired sedative effect. This oil has a distinct affinity to the skin, and is one of the few oils which has any effects against dandruff."
Source: Kurt Schnaubelt, Ph. D.: Advanced Aromatherapy