1. Department of Botany; University of British Columbia; Vancouver BC V6T 1Z4 Canada
2. Harvard University Herbaria; Cambridge MA 02138 USA
3. Institut Recherche en Biologie Végétale; QC H1X 2B2 Canada
4. Jardin botanique de Montréal, Department Sciences Biologiques; Université de Montréal; Montréal QC H1X 2B2 Canada
5. School of Environmental and Rural Science; University of New England; Armidale NSW 2351 Australia