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Systematics of Baccharis (Asteraceae: Astereae)

Grant number: 10/00519-8
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2010
Effective date (End): March 31, 2014
Field of knowledge:Biological Sciences - Botany - Plant Taxonomy
Principal Investigator:José Rubens Pirani
Grantee:Gustavo Heiden
Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):12/17911-3 - Evolution and biogeography of Baccharis (Asteraceae): a genus megadiverse in the Neotropical Region, BE.EP.DR


A comprehensive phylogenetic hypothesis for the predominantly Neotropical American genus Baccharis is necessary to test its monophyly and clarify the infrageneric relationships within the genus. Given its great morphological diversity and wide geographic distribution, phylogenetic studies based on molecular data to test the monophyly of the genus and investigate the relationships of its infrageneric groups are here proposed, allowing the recognition and taxonomic revision of smaller and monophyletic taxa. Therefore, a phylogenetic hypothesis for Baccharis is provided based on 248 species sampled, four molecular regions and Bayesian analyses. The results confirm subtribe Baccharidinae as a monogeneric lineage, and support a wide definition of Baccharis s.l., monophyletic and including all genera that were previously segregated from it. Baccharis subgen. Tarchonanthoides Heering, a group restricted to the southeastern South American grasslands and savannas, was chosen as a good target to first tackle for a taxonomic revision, due its small size, restricted area of occurrence when compared to the remaining subgenera, and morphological distinctiveness. This is the first attempt to provide a taxonomic revision of a subgenus of Baccharis according to a phylogenetic framework, and under no geographic constraint. Alongside the main goals, exploratory fieldwork and study of herbaria specimens allowed the description of eight new species. (AU)

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Scientific publications (12)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
HEIDEN, GUSTAVO; RIBAS, OSMAR DOS SANTOS. Baccharis umbellata (Asteraceae, Astereae): a new species endemic to the highest summits of Parana, Southern Brazil. PHYTOTAXA, v. 49, p. 23-28, . (11/18385-0, 10/00519-8)
SCHNEIDER, ANGELO ALBERTO; HEIDEN, GUSTAVO; BOLDRINI, ILSI IOB. Baccharis scopulorum, a new species of section Caulopterae (Asteraceae: Astereae) from rocky cliffs of southern Brazil. PHYTOTAXA, v. 15, p. 9-14, . (10/00519-8)
IGANCI, JOAO R. V.; HEIDEN, GUSTAVO; MIOTTO, SILVIA TERESINHA S.; PENNINGTON, R. TOBY. Campos de Cima da Serra: the Brazilian Subtropical Highland Grasslands show an unexpected level of plant endemism. Botanical Journal of the Linnean Society, v. 167, n. 4, p. 378-393, . (10/00519-8)
HEIDEN, GUSTAVO; LEONI, LUCIO DE SOUZA; NAKAJIMA, JIMI NAOKI. Baccharis magnifica (Asteraceae, Astereae): a striking new species endemic to the summits of Serra do Caparao, southeastern Brazil. PHYTOTAXA, v. 162, n. 4, p. 211-216, . (11/18385-0, 12/17911-3, 10/00519-8)
HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. Novelties towards a phylogenetic infrageneric classification of Baccharis (Asteraceae, Astereae). PHYTOTAXA, v. 289, n. 3, p. 285-290, . (11/18385-0, 12/17911-3, 10/00519-8)
HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. A synopsis and notes for Baccharis subgen. Tarchonanthoides (Asteraceae: Astereae). PHYTOTAXA, v. 60, p. 41-49, . (11/18385-0, 10/00519-8)
BONIFACINO, JOSE MAURICIO; HEIDEN, GUSTAVO; VALTIERRA, MARIA VICTORIA; MARCHESE, EDUARDO. Baccharis funkiae (Compositae: Astereae), a New Narrow Endemic Species from Uruguay. SYSTEMATIC BOTANY, v. 45, n. 4, p. 937-942, . (11/18385-0, 10/00519-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
HEIDEN, Gustavo. Systematics of Baccharis (Asteraceae: Astereae). 2014. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.

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