(Polygonum Bistorta.) _Bistort Root._
QUALITIES. This root has no odour, but is highly astringent. CHEMICAL
COMPOSITION. Its active principles are tannin and gallic acid. MED.
USES. It acts as an astringent, and is accordingly used in hemorrhages
and fluxes. DOSE of the root ℈j-ʒj; of a decoction f℥j-f℥ij. Combined
with _Calamus_ it has been successfully administered for the cure of
intermittent fevers. _See p. 167._
CALAMI RADIX. L. Acori Calami Radix. E.