Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)

The taxonomic significance of cypsela features of South American species of Lessingianthus (Vernonieae, Asteraceae) is analysed for the first time and discussed in relation to other genera of the tribe Vernonieae. The morphology of the cypselae of 112 species of the genus were analysed using stere...

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Autores principales: Angulo, María Betiana, Sosa, María de las Mercedes, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Csiro Publishing 2021
Materias:
Lepidaploinae
Taxonomy
Microcharacters
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28191
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28191
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spelling I48-R184-123456789-281912024-10-15T10:58:35Z Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae) Angulo, María Betiana Sosa, María de las Mercedes Dematteis, Massimiliano Lepidaploinae Taxonomy Microcharacters The taxonomic significance of cypsela features of South American species of Lessingianthus (Vernonieae, Asteraceae) is analysed for the first time and discussed in relation to other genera of the tribe Vernonieae. The morphology of the cypselae of 112 species of the genus were analysed using stereo-, light and scanning electron microscopy (SEM) to evaluate the infrageneric relationships and their reliability as taxonomic markers at a generic level. Characters such as cypsela pubescence, carpopodium structure, crystals and idioblasts on the fruit wall were examined. We established three types of cypsela on the basis of the presence or absence, and type of trichomes. Carpopodium is present in all species of the genus. Crystals are very variable in shape and size, with prismatic (rectangular and hexagonal) and styloid shapes. Idioblasts are present in all of the species, except for two. Cypsela features of Lessingianthus are often widespread in other related genera of Vernonieae. Therefore, these characters are not good taxonomic markers at the genus level, but they are valuable within genera to differentiate related species from one another. 2021-06-18T18:26:03Z 2021-06-18T18:26:03Z 2015-08-07 Artículo Angulo, María Betiana, Sosa, María de las Mercedes y Dematteis, Massimiliano, 2015. Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae). Australian Systematic Botany. Collingwood: Csiro Publishing, vol. 28, no. 3, p. 173-189. ISSN 1030-1887. 1030-1887 http://repositorio.unne.edu.ar/handle/123456789/28191 eng https://www.publish.csiro.au/sb/SB15022 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Csiro Publishing Australian Systematic Botany, 2015, vol. 28, no. 3, p. 173-189.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Lepidaploinae
Taxonomy
Microcharacters
spellingShingle Lepidaploinae
Taxonomy
Microcharacters
Angulo, María Betiana
Sosa, María de las Mercedes
Dematteis, Massimiliano
Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
topic_facet Lepidaploinae
Taxonomy
Microcharacters
description The taxonomic significance of cypsela features of South American species of Lessingianthus (Vernonieae, Asteraceae) is analysed for the first time and discussed in relation to other genera of the tribe Vernonieae. The morphology of the cypselae of 112 species of the genus were analysed using stereo-, light and scanning electron microscopy (SEM) to evaluate the infrageneric relationships and their reliability as taxonomic markers at a generic level. Characters such as cypsela pubescence, carpopodium structure, crystals and idioblasts on the fruit wall were examined. We established three types of cypsela on the basis of the presence or absence, and type of trichomes. Carpopodium is present in all species of the genus. Crystals are very variable in shape and size, with prismatic (rectangular and hexagonal) and styloid shapes. Idioblasts are present in all of the species, except for two. Cypsela features of Lessingianthus are often widespread in other related genera of Vernonieae. Therefore, these characters are not good taxonomic markers at the genus level, but they are valuable within genera to differentiate related species from one another.
format Artículo
author Angulo, María Betiana
Sosa, María de las Mercedes
Dematteis, Massimiliano
author_facet Angulo, María Betiana
Sosa, María de las Mercedes
Dematteis, Massimiliano
author_sort Angulo, María Betiana
title Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
title_short Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
title_full Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
title_fullStr Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
title_full_unstemmed Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
title_sort systematic significance of cypsela morphology in lessingianthus (vernonieae, asteraceae)
publisher Csiro Publishing
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28191
work_keys_str_mv AT angulomariabetiana systematicsignificanceofcypselamorphologyinlessingianthusvernonieaeasteraceae
AT sosamariadelasmercedes systematicsignificanceofcypselamorphologyinlessingianthusvernonieaeasteraceae
AT dematteismassimiliano systematicsignificanceofcypselamorphologyinlessingianthusvernonieaeasteraceae
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