Learn about the herb whose roots were used in ancient Rome to "help digestion and cause mirth." See its more modern uses and the concoction tips.

Discover the herb whose rhizome is harvested for its expectorant and antimicrobial effects. Read about its uses and find an infusion recipe.

Sums up the perennial's pharmaceutical value and appearance. Includes a warning.

Find a fact sheet on the herb used as a cough expectorant among children. Read details about its other uses and habitat.

Details on preparing the roots of the herb for different medicinal purposes written by Nicholas Culpeper, English physician of the 17th century.