@article {178,
	title = {Natural Hybridization in the Genus Cirsium-I. C. discolor (Muhl Ex. Willd) Spreng X C. muticum Michx},
	journal = {Bulletin of the Torrey Botanical Club},
	volume = {78},
	year = {1951},
	month = {05/1951},
	pages = {233-253},
	chapter = {233},
	author = {Gerald B. Ownbey}
}
