Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)

Floral microcharacters of the genus Chrysolaena H. Rob. (Vernonieae, Asteraceae) were analysed in detail for the first time in order to evaluate the taxonomic position of conflictive species in the group. The results were also compared with studies carried out in species of related genera. In additi...

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Autores principales: Via Do Pico, Gisela Mariel, Vega, Álvaro José, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Taylor and Francis Ltd 2021
Materias:
Anthers
Crystals
Idioblasts
Lepidaploinae
Style
Taxonomy
Trichomes
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28259
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28259
record_format dspace
spelling I48-R184-123456789-282592025-03-28T23:13:44Z Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae) Via Do Pico, Gisela Mariel Vega, Álvaro José Dematteis, Massimiliano Anthers Crystals Idioblasts Lepidaploinae Style Taxonomy Trichomes Floral microcharacters of the genus Chrysolaena H. Rob. (Vernonieae, Asteraceae) were analysed in detail for the first time in order to evaluate the taxonomic position of conflictive species in the group. The results were also compared with studies carried out in species of related genera. In addition to distinctive microcharacters previously studied in some species of the genus, other characters such as trichome types of the corolla, style, anthers and cypselae have been analysed for the first time. The presence of glandular apical appendage and cypselae are common characteristics among species Chrysolaena. In addition to these, this study shows that presence of glands on the style and corollas is another consistent characteristic in the genus. However, the absence of basal stylar node would not be a diagnostic character since this varies widely among species. The results indicate that most of the microcharacters of Chrysolaena analysed are quite consistent in the genus, but they are no more consistent than the pollen morphology (type ’C’) and chromosome base number (x D 10). Until now, these last two features would be most useful for separating Chrysolaena from the related genera Lessingianthus and Lepidaploa. At species level, the results show that related species can be distinguished by the different combinations of floral microcharacters. The value of microcharacters could be increased if they are combined with other morphological, cytological, and palynological data. 2021-07-08T14:31:00Z 2021-07-08T14:31:00Z 2016 Artículo Via Do Pico, Gisela Mariel, Vega, Álvaro José y Dematteis, Massimiliano, 2016. Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae). Systematics and Biodiversity. London: Taylor and Francis Ltd., vol. 14, no. 2, p. 224-243. ISSN 1478-0933. 1477-2000 http://repositorio.unne.edu.ar/handle/123456789/28259 eng http://dx.doi.org/10.1080/14772000.2015.1134699 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Taylor and Francis Ltd Systematics and Biodiversity, vol. 14, no. 2, p. 224-243.
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 Anthers
Crystals
Idioblasts
Lepidaploinae
Style
Taxonomy
Trichomes
spellingShingle Anthers
Crystals
Idioblasts
Lepidaploinae
Style
Taxonomy
Trichomes
Via Do Pico, Gisela Mariel
Vega, Álvaro José
Dematteis, Massimiliano
Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
topic_facet Anthers
Crystals
Idioblasts
Lepidaploinae
Style
Taxonomy
Trichomes
description Floral microcharacters of the genus Chrysolaena H. Rob. (Vernonieae, Asteraceae) were analysed in detail for the first time in order to evaluate the taxonomic position of conflictive species in the group. The results were also compared with studies carried out in species of related genera. In addition to distinctive microcharacters previously studied in some species of the genus, other characters such as trichome types of the corolla, style, anthers and cypselae have been analysed for the first time. The presence of glandular apical appendage and cypselae are common characteristics among species Chrysolaena. In addition to these, this study shows that presence of glands on the style and corollas is another consistent characteristic in the genus. However, the absence of basal stylar node would not be a diagnostic character since this varies widely among species. The results indicate that most of the microcharacters of Chrysolaena analysed are quite consistent in the genus, but they are no more consistent than the pollen morphology (type ’C’) and chromosome base number (x D 10). Until now, these last two features would be most useful for separating Chrysolaena from the related genera Lessingianthus and Lepidaploa. At species level, the results show that related species can be distinguished by the different combinations of floral microcharacters. The value of microcharacters could be increased if they are combined with other morphological, cytological, and palynological data.
format Artículo
author Via Do Pico, Gisela Mariel
Vega, Álvaro José
Dematteis, Massimiliano
author_facet Via Do Pico, Gisela Mariel
Vega, Álvaro José
Dematteis, Massimiliano
author_sort Via Do Pico, Gisela Mariel
title Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
title_short Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
title_full Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
title_fullStr Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
title_full_unstemmed Systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
title_sort systematic consideration of floral microcharacters of the south american genus chrysolaena (vernonieae, asteraceae)
publisher Taylor and Francis Ltd
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28259
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AT vegaalvarojose systematicconsiderationoffloralmicrocharactersofthesouthamericangenuschrysolaenavernonieaeasteraceae
AT dematteismassimiliano systematicconsiderationoffloralmicrocharactersofthesouthamericangenuschrysolaenavernonieaeasteraceae
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