A small, herbaceous European plant with blue-violet flowers from any species of genus Prunella.
Especially, Prunella vulgaris.
A hardy perennial flowering plant, Valeriana officinalis, with heads of sweetly scented pink or white flowers.
An extract of the dried roots of the Valeriana officinalis used in herbal medicine as a sedative.
More generally, any plant of the genus Valeriana.
The root of Valeriana officinalis, used in herbal medicine.