@book {120,
	title = {Liatris},
	series = {Flora of North America},
	volume = {21},
	year = {2006},
	publisher = {Oxford University Press, Inc.},
	organization = {Oxford University Press, Inc.},
	address = {New York},
	author = {Guy L. Nesom}
}
@inbook {509,
	title = {Ageratina},
	booktitle = {Magnoliophyta: Asteridae (in part): Asteraceae, part 3},
	series = {Flora of North America},
	volume = {21},
	year = {2006},
	publisher = {Oxford University Press, Inc.},
	organization = {Oxford University Press, Inc.},
	address = {New York, NY},
	author = {Guy L. Nesom}
}
