Verbatim text: Cherniawsky, D. M. and R. J. Bayer. 1998c. Systematics of North American Petasites (Asteraceae: Senecioneae). III. A taxonomic revision. Canad. J. Bot. 76: 2061–2075.
Author: Cherniawsky, D.M., Bayer, R.J.
Year: 1998c
Title: Systematics of North American Petasites (Asteraceae: Senecioneae). III. A taxonomic revision
Journal: Canad. J. Bot
Volume: 76
Pages: 2061–2075