Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil

Hexasepalum is the priority name for Diodella. In the present paper, we provide a synopsis of Hexasepalum. The genus differs from the remaining genera of the tribe Spermacoceae by the combination of infundibuliform flowers, 2-lobed stigmas, schizocarpic fruits, ventral face of the mericarps with two...

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Autores principales: Cabaña Fader, Andrea Alejandra, Salas, Roberto Manuel, Dessein, Steven, Cabral, Elsa Leonor
Formato: Artículo
Lenguaje:Inglés
Publicado: American Society of Plant Taxonomists 2021
Materias:
Diodia
Neotropics
Spermacoceae
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28551
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28551
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spelling I48-R184-123456789-285512025-03-06T11:01:17Z Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil Cabaña Fader, Andrea Alejandra Salas, Roberto Manuel Dessein, Steven Cabral, Elsa Leonor Diodia Neotropics Spermacoceae Hexasepalum is the priority name for Diodella. In the present paper, we provide a synopsis of Hexasepalum. The genus differs from the remaining genera of the tribe Spermacoceae by the combination of infundibuliform flowers, 2-lobed stigmas, schizocarpic fruits, ventral face of the mericarps with two depressions, seeds with T or Y shaped ventral grooves, and pollen grains with two types of supratectal elements. We propose two combinations, i.e. Hexasepalum domingense and H. vaginale, and the formal synonymization of H. angustifolium (including Diodella crassifolia). We also propose two new synonyms: Diodia rosmarinifolia [= Diodella rosmarinifolia] is placed in the synonymy of H. apiculatum, andDiodia incana is now considered a synonym of H. teres. We choose lectotypes for H. vaginale, and for two synonyms of H. apiculatum. In addition, we describe and illustrate a new species endemic from Bahia, Brazil, H. zappiae sp. nov. Detailed descriptions are provided only for the species imperfectly known; otherwise comprehensive taxonomic descriptions are mentioned for each species. The descriptions of the Hexasepalum species are complemented with a key, geographical distributions, and illustrations of key morphological characters. Line drawings are provided for species not illustrated before in literature. 2021-09-02T20:37:14Z 2021-09-02T20:37:14Z 2016-06-28 Artículo Cabaña Fader, Andrea Alejandra, et al., 2016. Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil. Systematic Botany. Saint Louis: American Society of Plant Taxonomists, vol. 41, no. 2, p. 408-422. ISSN 1548-2324. 0363-6445 http://repositorio.unne.edu.ar/handle/123456789/28551 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf American Society of Plant Taxonomists Systematic Botany, 2016, vol. 41, no. 2, p. 408-422.
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 Diodia
Neotropics
Spermacoceae
spellingShingle Diodia
Neotropics
Spermacoceae
Cabaña Fader, Andrea Alejandra
Salas, Roberto Manuel
Dessein, Steven
Cabral, Elsa Leonor
Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
topic_facet Diodia
Neotropics
Spermacoceae
description Hexasepalum is the priority name for Diodella. In the present paper, we provide a synopsis of Hexasepalum. The genus differs from the remaining genera of the tribe Spermacoceae by the combination of infundibuliform flowers, 2-lobed stigmas, schizocarpic fruits, ventral face of the mericarps with two depressions, seeds with T or Y shaped ventral grooves, and pollen grains with two types of supratectal elements. We propose two combinations, i.e. Hexasepalum domingense and H. vaginale, and the formal synonymization of H. angustifolium (including Diodella crassifolia). We also propose two new synonyms: Diodia rosmarinifolia [= Diodella rosmarinifolia] is placed in the synonymy of H. apiculatum, andDiodia incana is now considered a synonym of H. teres. We choose lectotypes for H. vaginale, and for two synonyms of H. apiculatum. In addition, we describe and illustrate a new species endemic from Bahia, Brazil, H. zappiae sp. nov. Detailed descriptions are provided only for the species imperfectly known; otherwise comprehensive taxonomic descriptions are mentioned for each species. The descriptions of the Hexasepalum species are complemented with a key, geographical distributions, and illustrations of key morphological characters. Line drawings are provided for species not illustrated before in literature.
format Artículo
author Cabaña Fader, Andrea Alejandra
Salas, Roberto Manuel
Dessein, Steven
Cabral, Elsa Leonor
author_facet Cabaña Fader, Andrea Alejandra
Salas, Roberto Manuel
Dessein, Steven
Cabral, Elsa Leonor
author_sort Cabaña Fader, Andrea Alejandra
title Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
title_short Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
title_full Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
title_fullStr Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
title_full_unstemmed Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil
title_sort synopsis of hexasepalum (rubiaceae), the priority name for diodella and a new species from brazil
publisher American Society of Plant Taxonomists
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28551
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AT salasrobertomanuel synopsisofhexasepalumrubiaceaetheprioritynamefordiodellaandanewspeciesfrombrazil
AT desseinsteven synopsisofhexasepalumrubiaceaetheprioritynamefordiodellaandanewspeciesfrombrazil
AT cabralelsaleonor synopsisofhexasepalumrubiaceaetheprioritynamefordiodellaandanewspeciesfrombrazil
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