culantrillo

from The Century Dictionary.

• noun In many Spanish countries, the name applied to the maiden-hair, Adiantum Capillus-Veneris, and ferns resembling it, decoctions or syrups of which are administered to women at childbirth and for menstrual irregularities.
• noun A name applied to several other plants used medicinally, as Tetilla hydrocotylæfolia, a Chilean plant with astringent properties, belonging to the saxifrage family.