Leonardo Fioravanti, an Italian Physitian, beside many other secrets, assumeth unto himself the discovery of one concerning Pellitory of the Wall; that is, that it never groweth in the sight of the North star.
1653, Nicholas Culpeper, The English Physician Enlarged, Folio Society 2007, p. 216:
The juice of Pellitory-of-the-Wall clarified and boiled into a syrup with honey, and a spoonful of it drunk every morning by such as are subject to the dropsy; if continuing that course though but once a week, if ever they have the dropsy, let them come but to me and I will cure them gratis.