Systematics of Baccharis (Asteraceae: Astereae)

• Grant number: 10/00519-8
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): May 01, 2010
• Effective date (End): March 31, 2014
• Field of knowledge: Biological Sciences - Botany
• Principal Investigator: José Rubens Pirani
• Grantee: Gustavo Heiden
• Home 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

Abstract

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)

Scientific publications

(10)

(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; PIRANI, JOSE RUBENS. Novelties towards a phylogenetic infrageneric classification of Baccharis (Asteraceae, Astereae). PHYTOTAXA, v. 289, n. 3, p. 285-290, DEC 29 2016. Web of Science Citations: 5.

HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. Taxonomy of Baccharis subgen. Tarchonanthoides (Asteraceae: Astereae: Baccharidinae), a group from the southeastern South American grasslands and savann. PHYTOTAXA, v. 241, n. 1, p. 1-70, JAN 6 2016. Web of Science Citations: 2.

HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. Baccharis nebularis Asteraceae, Astereae): a new species of B. subgen. Tarchonanthoides sect. Curitybenses from the mountains of Southern Brazil. PHYTOTAXA, v. 177, n. 2, p. 125-130, AUG 27 2014. Web of Science Citations: 2.

HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. Two new species of Baccharis subgen. Baccharis (Asteraceae, Astereae) with single-flowered female capitula from the Serra do Cipo, Minas Gerais, Brazil. PHYTOTAXA, v. 164, n. 2, p. 141-148, APR 4 2014. Web of Science Citations: 2.

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, MAR 17 2014. Web of Science Citations: 5.

HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. Baccharis napaea (Asteraceae, Astereae): a new species of subgen. Tarchonanthoides sect. Coridifoliae from the subtropical highlands of southern Brazil. PHYTOTAXA, v. 66, p. 49-54, SEP 21 2012. Web of Science Citations: 2.

HEIDEN, GUSTAVO; PIRANI, JOSE RUBENS. A synopsis and notes for Baccharis subgen. Tarchonanthoides (Asteraceae: Astereae). PHYTOTAXA, v. 60, p. 41-49, JUL 19 2012. Web of Science Citations: 5.

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, MAR 21 2012. Web of Science Citations: 2.

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, DEC 2011. Web of Science Citations: 45.

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, JAN 28 2011. Web of Science Citations: 2.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

HEIDEN, Gustavo. Sistematics of Baccharis (Asteraceae: Astereae). 2014. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Biociências São Paulo.