_Marsh Rosemary._ _Radix._
[This is a perennial plant found in all parts of the United States. It
flowers in the months of July and August. The root, which is the part
used in medicine, is astringent, and contains large proportions of
tannin and gallic acid. As a medicine it has been much used in this
country, and is prescribed with advantage in a number of diseases in
which astringents are required. In chronic dysentery, diarrhœa, and
cholera infantum, more especially, it has been found exceedingly
beneficial. It may be given in infusion or decoction, made by adding ʒij
of the root to ℥xij of water.]
SUCCI SPISSATI. E. See _Extracta_.