Substances & Homeopatic Remedies

Ratanhia peruviana

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Ratanhia is remarkable for its entire, ovate, acuminate leaves, covered on both sides with silky hair is one of the species most known as yielding the Rhatany root of commerce, but all the species of Krameria, as far as known, are intensely astringent.
     In Peru an extract is made from this species which is a mild, easily assimilated astringent medicine, possessed of great power in passive, bloody or mucous discharges. It acts as a tonic in weakness of digestive organs and muscular debility and is even useful in intermittent and putrid fevers. It is also styptic and restores tone to relaxed parts and when applied as plasters is said to cure all kinds of ulcers.

Krameria triandra R. & P. (Krameriaceae) -- Rhatany
The essential constituent is a peculiar tannic acid, known as Rhataniatannic acid or Krameria tannic acid, closely allied to catechu-tannic acid. By the action of dilute acid it is decomposed into a crystallizable sugar, and Rhatania-red. No gallic acid is present. Rhatanin is a homologue of tyrosine, and is identical with angelin, geoffrayin, and andirin. It appears to contain also lignin, and small quantities of gum starch, saccharine matter, and a peculiar acid, krameric acid. The mineral acids and most of the metallic salts throw down precipitates with the infusion, decoction and tincture of Rhatany, and are incompatible in prescription.(