@inbook {114,
	title = {Cirsium},
	booktitle = {Flora of North America},
	volume = {19},
	year = {2006},
	pages = {95-164},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	edition = {2010},
	address = {New York, NY},
	author = {David J. Keil},
	editor = {Flora of North America Editorial Committee}
}
