@inbook {449,
	title = {Achillea},
	booktitle = {Flora of North America},
	volume = {19},
	year = {2006},
	pages = {492-494},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	address = {New York, NY},
	author = {Debra K. Trock},
	editor = {Editorial Committee of Flora of North America ,}
}
