Therapeutically used rhizome of the spotted fern.
Also used as an additive in bitter schnapps.
No pharmacopoeial quality.
HMPC monograph: Traditional-use: expectorant for coughs and colds, for short-term constipation
ESCOP: not processed.
Commission E: no monograph
Empirical medicine: diseases of the respiratory tract, bronchitis, pulmonary tuberculosis.