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11 August 2020 Comparative Anatomy of Cypselae in the Complex Group Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus: Contributions to the Systematics of Vernonieae (Compositae)
Danilo Marques, Rafael de Oliveira Franca, María Betiana Angulo, Gisela Mariel Via do Pico, Massimiliano Dematteis, Juliana Marzinek
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Abstract

Circumscription of genera in the tribe Vernonieae is complex due to overlapping morphological features among genera such as Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus. These genera have been segregated from the genus Vernonia s. l., but their classification remains questionable because they lack clear diagnostic characters to contribute to this classification. Several studies have demonstrated the importance of the anatomy of cypselae for classification in Compositae; cypselae provide diagnostic characters for some genera. We studied the anatomy of the cypselae, including pericarp, callus, carpopodium, and pappus of Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus, evaluating their potential for clarifying systematic problems in these genera. Our study demonstrated the cypselae features are uniform, and they do not contribute diagnostic characters useful in generic circumscription; however, cypselae anatomical characters do segregate some species. Our data also suggest that Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus should be circumscribed in a single genus Lepidaploa.

© Copyright 2020 by the American Society of Plant Taxonomists
Danilo Marques, Rafael de Oliveira Franca, María Betiana Angulo, Gisela Mariel Via do Pico, Massimiliano Dematteis, and Juliana Marzinek "Comparative Anatomy of Cypselae in the Complex Group Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus: Contributions to the Systematics of Vernonieae (Compositae)," Systematic Botany 45(3), 668-680, (11 August 2020). https://doi.org/10.1600/036364420X15935294613545
Published: 11 August 2020
JOURNAL ARTICLE
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KEYWORDS
Asteraceae
crystal
fruit
pericarp
Vernonia
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