Comparative Anatomy of Cypselae in the Complex Group Chrysolaena, Echinocoryne, Lepidaploa, and Lessingianthus: Contributions to the Systematics of Vernonieae (Compositae)
| Autor: | Gisela Mariel Via Do Pico, Rafael de Oliveira Franca, Danilo Marques, Juliana Marzinek, María Betiana Angulo, Massimiliano Dematteis |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Systematics food.ingredient biology Vernonieae Plant Science Comparative anatomy Asteraceae biology.organism_classification Tribe (biology) 010603 evolutionary biology 01 natural sciences Lepidaploa 03 medical and health sciences 030104 developmental biology food Genus Evolutionary biology Lessingianthus Genetics Ecology Evolution Behavior and Systematics |
| Zdroj: | Systematic Botany. 45:668-680 |
| ISSN: | 0363-6445 |
| DOI: | 10.1600/036364420x15935294613545 |
| Popis: | —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. |
| Databáze: | OpenAIRE |
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