Photo and description from Fedco Seeds (www.fedcoseeds.com).
Valeriana officinalis Open-pollinated. Known as Nature’s Tranquilizer or Herbal Valium, valerian root is used to reduce tension and anxiety, alleviate insomnia, and relieve muscle spasms and cramping. Harvest roots in the fall of the second or later year. Early Greeks referred to valerian as phu (like our “phew”) because of the distinctive fetid musky smell of the roots. Avoid high doses for prolonged periods. Tall leafy 3–5' perennial with clusters of honey-scented pale pink flowers. Remove flowers to hasten root development. Plant in moist fertile soil about 1' apart.