Betony (Wood), or Betonica officinalis, L. alow perennial plant, growing wild in woods, and thickets ; its flowers, which appear in July and August, are of a purplish colour, and stand in spikes on the tops of the stalks.— See With 530 ; and Curt. Lond. fuse. 3, . 33.

Tanners have employed this plant as a substitute for oak-bark ; and, according to Dambourney, the leaves and branches of the betonv, when in blossom, may be used for dyeing wool of a permanent dark-brown colour, when previously dressed in a weak solution of bismuth.

The leaves and flowers have a bitterish taste, accompanied with a weak aromatic flavour. The)' are mild corroborants, and, when infused, or gently boiled, the decoction may be drank as tea : a strong tincture made in rectified spirit, has proved beneficial in laxity and debility, when taken in small, repeated doses.

It is remarkable, that the roots of this plant greatly differ in quality from the other parts : the former are bitter, nauseous, and, like the roots of hellebore, occasion violent diarrhoea, when taken in a small dose. It is farther affirmed, that betony affects those who gather any quantity of its leaves and flowers, with a disorder resembling the effects of intoxication. Betula. See Birch.