BALDUINIA

O gênero Baccharis L. (Asteraceae - Astereae) no sul do Brasil. 1. Seção Cylindricae Heering, série Cylindricae (Heering) Giuliano

Abstract: A taxonomic study of the genus Baccharis L. section Cylindricae Heering (series Cylindricae (Heering) Giuliano), is presently realized to southern Brazil. Eighteen taxa were recognized: Baccharis brevifolia DC., B. camporum DC., B. cognata DC., B. humilis Sch.-Bip. ex Baker, B. leptocephala DC., B. leptophylla DC., B. microdonta DC., B. pentodonta Malme, B. pentziifolia Sch.-Bip., B. petraea Heering, B. pseudotenuifolia Malag., B. reticularia DC., B. retusa DC., B. rufescens Spreng., B. sessiliflora Vahl, B. subdentata DC., including two new species: Baccharis multifolia An. S. de Oliveira, Deble & Marchiori and Baccharis trilobata An. S. de Oliveira & Marchiori. Baccharis pseudobrevifolia D. J. N. Hind, B. pseudotenuifolia Malag. var. leptophylla (DC.) Giuliano and B. sessiliflora Vahl var. subcuneata Malag. were reduzed to synonymy. All species are described, illustrated and segregated in a dichotomous key. Key words: Baccharis, section Cylindricae, series Cylindricae, Asteraceae, Astereae, southern brazilian flora.