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Issue: Vol. 577 No. 1: 29 December 2022
Type: Article
Published: 2022-12-29
DOI: 10.11646/phytotaxa.577.1.6
Page range: 125-132
Abstract views: 214
PDF downloaded: 5

Systematic significance of cypselae in the Calea teucriifolia complex

Universidade Federal do Ceará, Departamento de Biologia, Centro de Ciências, Programa de Pós-graduação em Sistemática, Uso e Conservação da Biodiversidade, Av. Mister Hull s/n, campus do Pici, 60440-900, Fortaleza, Ceará, Brasil.
Universidade Federal do Rio Grande do Sul, Programa de Pós-graduação em Botânica, Laboratório de Sistemática Vascular, Prédio 43432, sala 107, Porto Alegre, RS 91501-970, Brazil.
Universidade Federal de Goiás, Instituto de Ciências Biológicas, Câmpus Samambaia, Av. Esperança, s/n, Vila Itatiaia, 74690-900, Goiânia, Goiás, Brasil.
Universidade Federal de Uberlândia, Instituto de Biologia, Programa de Pós-graduação em Biologia Vegetal, Campus Umuarama, Bloco 2D, 38.400–902 Uberlândia, Minas Gerais, Brazil.
cypsela anatomy Neurolaeneae phytomelanin Eudicots

Abstract

The Calea teucriifolia group is composed by four species of the tribe Neurolaeneae (Asteraceae). Despite numerous attempts to taxonomically understand this group of species through macromorphological characters, no progress has been made due to the overlapping of these characters. Therefore, we propose to evaluate the taxonomic values of cypselae morphology and anatomy for this group. Studies focused on cypsela have represented an advance, since patterns of phytomelanin deposition, pericarp and pappus morphology have allowed classifications within Asteraceae. Our results demonstrate that the cypselae of the analyzed group have a high morphological uniformity. Hence, cypsela morphology does not have characters that support separation of the species. However, the patterns of phytomelanin deposition in this group represent an anatomical novelty in Calea, and perhaps, in Neurolaeneae. The Calea teucriifolia group has the same deposition pattern observed in the tribe Eupatorieae. New systematic approaches are needed to solve taxonomic questions in the Calea teucriifolia group, and an expansion of the cypsela anatomical studies of the Neurolaeneae genera could demonstrate whether the Eupatorieae phytomelanin pattern of deposition could correspond to an apomorphy for the tribe.

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How to Cite

Marques, D., Resende Bueno, V., Magalhães Teles, A. & Marzinek, J. (2022)

Systematic significance of cypselae in the Calea teucriifolia complex

. Phytotaxa 577 (1): 125–132. https://doi.org/10.11646/phytotaxa.577.1.6