@article {41701,
	title = {Systematics of North American Petasites (Asteraceae: Senecioneae). I. Morphometric analyses},
	volume = {76},
	year = {1998},
	pages = {23-36},
	publisher = {Canadian Journal of Botany},
	url = {http://article.pubs.nrc-cnrc.gc.ca/RPAS/RPViewDoc?_handler_=HandleInitialGet\&calyLang=eng\&journal=cjb\&volume=76\&articleFile=b97-152.pdf},
	author = {Cherniawsky, Donna and Bayer, Randall J.}
}
