Phyiologia (March 1997) 82(3);137-141. NEW COMBINATIONS IN SYMPHYOTRICHUM (SYN. ASTER, ASTERACEAE: ASTEREAE) SPECIES FROM NORTHEASTERN NORTH AMERICA 1 2 Luc Brouillet & Jacques Labrecque Herbier Marie-Victorin, Institut de recherche en biologic v6g6tale, Universite de Montreal, 4101 est, rue Sherbrooke, Montreal, Quebec, HIX 2B2 CANADA email:
[email protected] 2 Current address: Service de la diversity biologique. Direction de la conservation et du patrimoine 6cologique, Ministere de I'Environnement et de la Faune, Gouvemement du Quebec, 150 est Ren6-L^vesque, 6i^me 6tage, Qu6bec, Qu6bec, GIR 4Y1 CANADA submitted 21 November 1997 ABSTRACT New combinations are proposed in Symphyotrichum for the following taxa, originally described in Aster. S. novi-belgii (L.) Nesom var. crenifolium (Femald) Labrecque & Brouillet, S. novi-belgii (L.) Nesom var. villicaule (A. Gray) Labrecque & Brouillet, S. ontarione (Wiegand) Nesom var. glabratus (Semple) Brouillet & Bouchard, and 5 . robynsianum (Rousseau) Brouillet & Labrecque. Lectotypification of the latter is also proposed. KEY WORDS: Asteraceae, Astereae, Symphyotrichum, Aster, nomenclature, northeastern North America Genus Symphyotrichum (syn.: Aster subgenus Symphyotrichum , Jones 1980) is a North American genus notorious for its difficult taxonomy. One of the problems is the correct application of names. While our treatment of the Symphyotrichum novi-belgii complex in Quebec and adjacent areas was being published with relevant synonymy under A^/er (Labrecque & Brouillet 1996), the taxonomic revision of Aster s.l. by Nesom (1994) appeared. Meanwhile, Semple, et al. (1996) published their second revision of Aster for Ontario. In this floristic study, they used the name A . robynsianus Rousseau (1957) for the taxon that had been improperly called A. 137
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