The toothworts and broom rapes are Draconidae, I think, and wholly parasites.
"Proserpina, Volume 2" by John Ruskin
It was the lesser broom rape, and hardly a clover plant escaped this parasitic growth.
"Nature Near London" by Richard Jefferies
A large and particularly fleshy broom-rape, recently flowering, festered unpleasantly everywhere.
"The Leicestershires beyond Baghdad" by Edward John Thompson