mugwort

pujo Any of several aromatic plants of the genus Artemisia native to Europe and Asia.
Artemisia vulgaris, traditionally used medicinally.
1653, (w), The English Physician Enlarged, Folio Society 2007, p. 197:

Mugwort is with good success put among other herbs that are boiled, for women to sit over the hot decoction to draw down their courses, to help the delivery of the birth and expel the afterbirth, as also for the obstructions and inflammations of the mother.