VALERIANA, in botany, a genus of the triandria monogynia class. It has no calix; the corolla consists of one petal, gibbous at the base, and situate above the fruit. There are 20 species, three of them natives of Europe, viz. the officinalis, or great wild valerian, whose root is alexipharmic, sudorific, and diuretic; the dioica, or marsh valerian; and the locusta, or lambs-lettuce.