NUEVAS SECCIONES EN BACCHARIS (ASTERACEAE, ASTEREAE) DE AMÉRICA DEL SUR

Se describen 15 nuevas secciones del género Baccharis L. (Asteraceae, Astereae) de distribución sudamericana, cuatro de ellas pertenecientes al subgénero Baccharis: Baccharis sect. Caespitosae Giuliano, Baccharis sect. Frenguellianae Giuliano, Baccharis sect. Spicatae Giuliano y Baccharis sect. Tucumanenses Giuliano; cinco pertenecientes al subgénero Molina (Pers.) Heering: Baccharis sect. Albidae Giuliano, Baccharis sect. Divaricatae Giuliano, Baccharis sect. Effusae Giuliano, Baccharis sect. Lilloanae Giuliano y Baccharis sect. Megapotamicae Giuliano; una perteneciente al subgénero Pteronioides Heering: Baccharis sect. Australes Giuliano; una perteneciente al subgénero Tarchonanthoides Heering: Baccharis sect. Coridifoliae Giuliano; y cuatro secciones no asignadas a subgénero alguno: Baccharis sect. Arenariae Giuliano, Baccharis sect. Rodriguezianae Giuliano, Baccharis sect. Tenellae Giuliano y Baccharis sect. Thymifoliae Giuliano. Se proponen tres nuevas combinaciones: Baccharis sect. Heterothalamus (Less.) Giuliano, Baccharis sect. lema (Phil.) Giuliano y Baccharis sect. Palenia (Phil.) Giuliano. Se designa un lectotipo para B. arenaria Baker. Fifteen new sections of genus Baccharis L. (Asteraceae, Astereae) from South America are described, four of them belonging to subgenus Baccharis: Baccharis sect. Caespitosae Giuliano, Baccharis sect. Frenguellianae Giuliano, Baccharis sect. Spicatae Giuliano, and Baccharis sect. Tucumanenses Giuliano; five belonging to subgenus Molina (Pers.) Heering: Baccharis sect. Albidae Giuliano, Baccharis sect. Divaricatae Giuliano, Baccharis sect. Effusae Giuliano, Baccharis sect. Lilloanae Giuliano, and Baccharis sect. Megapotamicae Giuliano; one belonging to subgenus Pteronioides Heering: Baccharis sect. Australes Giuliano; belonging to subgenus Tarchonanthoides Heering: Baccharis sect. Coridifoliae Giuliano; and four sections not assigned to any subgenus: Baccharis sect. Arenariae Giuliano, Baccharis sect. Rodríguezianae Giuliano, Baccharis sect. Tenellae Giuliano, Baccharis sect. Thymifoliae Giuliano. Three new combinations are proposed: Baccharis sect. Heterothalamus (Less.) Giuliano, Baccharis sect, lema (Phil.) Giuliano, and Baccharis sect. Palenia (Phil.) Giuliano. A lectotype is designated for B. arenaria Baker.