ragwort

plural ragworts

1. countableuncountableAny of a number of wild flowering plants with yellow flowers in the family Asteraceae, mostly belonging to Senecio and related genera.

   Sea-poppies and ragwort were plants of ill-fame, too.

   1936, Rollo Ahmed, The Black Art, London: Long, page 157

   2 more examples

   Ragwort is under the command of dame Venus, and cleanses, digests and discusses.

   1653, Nicholas Culpeper, The English Physician Enlarged, Folio Society, published 2007, page 237

   As we all know, witches ride through the air on a broom, but sometimes their means of locomotion was a bulrush, a branch of thorn, mullein stalks, cornstalk, or ragweed, called fairies' horse in Ireland.

   1940, Rosetta E. Clarkson, Green Enchantments: The Magic Spell of Gardens, The Macmillan Company, page 267