@article {7986,
	title = {Xerochrysum Tzvelev, a pre-existing generic name for Bracteantha Anderb. and Haegi (Asteraceae: Gnaphalieae)},
	journal = {Kew Bull},
	volume = {56},
	year = {2001},
	month = {2001///},
	pages = {1013 - 1015},
	author = {R.J. Bayer}
}
@inbook {7756,
	title = {Petasites},
	booktitle = {Flora of North America},
	volume = {20},
	year = {2006},
	month = {2006///},
	pages = {635 - 640},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	author = {R.J. Bayer and A.L. Bogle and D.M. Cherniawsky},
	editor = {Committee, Flora of North America Editorial}
}
