The name "Osmund" is thought to be derived from os, the mouth, or os, bone, and mundare, to cleanse, or from gross mond kraut, the Greater moonwort; but others refer it to Saint Osmund wading a river, whilst bearing the Christ on his shoulders.
"Herbal Simples Approved for Modern Uses of Cure"
William Thomas Fernie
The moonwort is supposed to be a very supernatural plant, and to have the power of opening locks if you place a leaf of it in the keyhole.
"Monitress Merle"
Angela Brazil
I've never found any moonwort.
"Monitress Merle"
Angela Brazil