Valerian Root: (Valeriana officinalis, Valerianaceae) This flowering plant is adorned with sweet smelling pink or white flowers.  This sweet smelling flower was earlier used for perfume.
This plant is native to Asia and recently introduced to North America.
This dietary supplement is derived from the plants' roots, and is used for anxiety and sedation for a calming  mood. Greece and Rome main use for this plant was for insomnia.
The following is a short list of it's benefits:
Sedative
Anit-convulsive effects
Migraines
pain relief
Muscle relaxer
Anxiety
Restlessness
Gas pain

Including in these benefits it is a great nutritional supplement.