@book {156,
	title = {An Illustrated Flora of the Northern United States, Canada And The British Possessions},
	volume = {3},
	year = {1913},
	publisher = {Charles Scribner{\textquoteright}s Sons},
	organization = {Charles Scribner{\textquoteright}s Sons},
	edition = {2},
	author = {Nathaniel Lord Britton and Addison Brown}
}
@book {152,
	title = {Flora boreali-americana :sistens caracteres plantarum quas in America septentrionali collegit et detexit Andreas Michaux.},
	volume = {2},
	year = {1803},
	pages = {89-90},
	author = {Andre Michaux}
}
@book {118,
	title = {Flora caroliniana: secunda systema vegetabilium perillustris Linnaei digesta...},
	year = {1788},
	note = {Flora caroliniana: secunda systema vegetabilium perillustris Linnaei digesta; characteres essentiales naturalesve et differentias veras exhibens; cum emendationibus numerosis: descriptionum antea evulgatarum: adumbrationes stirpium plus mille continens: necnon, generibus novis non paucis, speciebus plurimis novisq.},
	address = {London},
	author = {Walter, Thomas}
}
@book {161,
	title = {Native American Ethnobotany},
	year = {1998},
	publisher = {Timber Press, Inc.},
	organization = {Timber Press, Inc.},
	address = {Portland, OR},
	author = {Daniel E. Moerman}
}
@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 ,}
}
