@inbook {664,
	title = {Compositae: Tribe Gymnarrheneae},
	booktitle = {Flowering Plants, Eudicots, Asterales},
	series = {Families and Genera of Vascular Plants},
	volume = {8},
	year = {2006},
	pages = {90-112},
	publisher = {Springer-Verlag},
	organization = {Springer-Verlag},
	address = {Berlin},
	author = {C. Jeffrey},
	editor = {Kadereit, J.W. and C. Jeffrey}
}
@book {218,
	title = {Flora of North America},
	series = {Magnoliophyta: Asteridae(in part): Asteraceae, part1},
	volume = {19},
	year = {2006},
	pages = {202-203},
	publisher = {Oxford University Press, Inc.},
	organization = {Oxford University Press, Inc.},
	address = {New York},
	url = {www.fna.org},
	author = {Strother, John L},
	editor = {Flora of north America Editorial Commitee ,}
}
@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 {204,
	title = {Rudbeckia},
	booktitle = {Flora of North America},
	volume = {21},
	year = {2006},
	author = {Lowell E. Urbatsch and Patricia B. Cox},
	editor = {Editorial Committee of Flora North America,}
}
@inbook {321,
	title = {Stokesia},
	booktitle = {Flora of North America},
	volume = {19},
	year = {2006},
	pages = {201-202},
	publisher = {Oxford University Press, Inc},
	organization = {Oxford University Press, Inc},
	edition = {2006},
	address = {New York, NY},
	author = {Strother, John L}
}
@article {276,
	title = {Stomatal behavior of ozone-sensitive and -insensitive coneflowers ( Rudbeckia laciniata var. digitata ) in Great Smoky Mountains National Park},
	journal = {New Phytologist},
	year = {2006},
	month = {07/2006},
	author = {L. E. Grulke and H.S. Neufeld and A.W. Davison and M. Roberts and A.H. Chappelka}
}
@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 ,}
}
@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}
}
@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}
}
