Blue Vervain

The leaves and roots are antiperiodic, diaphoretic, emetic, expectorant, tonic, vermifuge and vulnerary[4, 21, 46, 222]. The roots are more active than the leaves[222]. The plant is used in the treatment of stomach aches, gravel, worms and scrofula[4, 257]. An infusion of the roots, leaves or seeds has been used in the early stages of fevers[257]. A snuff made from the dried flowers has been used to treat nose bleeds[257].