Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 184.

Northern Husbandry, 15/09/1732, ¶1058:

‘Tanacetum’ [Tansy] and ‘Artemisia’ [Wormwood] are boiled up and they help the foetus to pass easily through the vagina; this is extraordinarily appreciated by women in childbirth. I saw ‘Tanacetum’ being dried at all the farms but there was no one who would tell me what it was used for.