The grimoire
Six plants that turn up repeatedly in British and northern European folklore, and what the record actually says about each.
Mugwort
The traveller's herb, bound to roadsides, dreams, and the eve of midsummer.
Rosemary
For remembrance, at weddings and at funerals alike.
Yarrow
Battlefield herb, divination stalk, and hedgerow constant.
Vervain
The herb of the altar, gathered at the rising of the dog star.
Mullein
Hag's taper, burnt as a torch and planted as a sentry.
Elder
Never cut without asking. The tree with a resident.