Prunella vulgaris, a species in the mint family.
Valeriana officinalis, a species in the valerian family.
Stachys, a genus of plants in the mint family, heal-all, self-heal, woundwort, betony, lamb's ears, hedgenettle.
Any of very many semiparasitic flowering plants, of the genus Pedicularis, related to wood betony.