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Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam

Dichocarpum hagiangense from Ha Giang province, northern Vietnam is described and illustrated. Diagnostic features of the new species are a short rhizomatous stem, (2–)3-foliolate or simple leaves, and pink-purple flowers. The described species is distinct from closely allied D. trifoliolatum in hav...

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Autores principales: Nguyen, Minh Ty, Trinh, Ngoc Bon, Tran, Thanh Thi Viet, Thanh, Tran Duc, Phan, Long Ke, Pham, Van The
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7518158/
https://www.ncbi.nlm.nih.gov/pubmed/33024628
http://dx.doi.org/10.7717/peerj.9874
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author Nguyen, Minh Ty
Trinh, Ngoc Bon
Tran, Thanh Thi Viet
Thanh, Tran Duc
Phan, Long Ke
Pham, Van The
author_facet Nguyen, Minh Ty
Trinh, Ngoc Bon
Tran, Thanh Thi Viet
Thanh, Tran Duc
Phan, Long Ke
Pham, Van The
author_sort Nguyen, Minh Ty
collection PubMed
description Dichocarpum hagiangense from Ha Giang province, northern Vietnam is described and illustrated. Diagnostic features of the new species are a short rhizomatous stem, (2–)3-foliolate or simple leaves, and pink-purple flowers. The described species is distinct from closely allied D. trifoliolatum in having longer sepals, shape and obcordate apex of petal limbs, shorter flower stem, number and tooth shape of basal leaves; it differs from D. basilare and D. carinatum in having stem leaf, retuse apex and longer of central leaflet, number and (2–)3-foliated (or simple) of leaf. With the support of molecular data, the new species was clearly distinguished from other species in the Dichocarpum group by eight autapomorphic characters in nrITS sequence. A key to all species of Dichocarpum is provided. We suggest the IUCN conservation status of D. hagiangense to be “Critically Endangered”. A newest checklist of the family Ranunculaceae in Vietnam is updated.
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spelling pubmed-75181582020-10-05 Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam Nguyen, Minh Ty Trinh, Ngoc Bon Tran, Thanh Thi Viet Thanh, Tran Duc Phan, Long Ke Pham, Van The PeerJ Biodiversity Dichocarpum hagiangense from Ha Giang province, northern Vietnam is described and illustrated. Diagnostic features of the new species are a short rhizomatous stem, (2–)3-foliolate or simple leaves, and pink-purple flowers. The described species is distinct from closely allied D. trifoliolatum in having longer sepals, shape and obcordate apex of petal limbs, shorter flower stem, number and tooth shape of basal leaves; it differs from D. basilare and D. carinatum in having stem leaf, retuse apex and longer of central leaflet, number and (2–)3-foliated (or simple) of leaf. With the support of molecular data, the new species was clearly distinguished from other species in the Dichocarpum group by eight autapomorphic characters in nrITS sequence. A key to all species of Dichocarpum is provided. We suggest the IUCN conservation status of D. hagiangense to be “Critically Endangered”. A newest checklist of the family Ranunculaceae in Vietnam is updated. PeerJ Inc. 2020-09-22 /pmc/articles/PMC7518158/ /pubmed/33024628 http://dx.doi.org/10.7717/peerj.9874 Text en ©2020 Nguyen et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Biodiversity
Nguyen, Minh Ty
Trinh, Ngoc Bon
Tran, Thanh Thi Viet
Thanh, Tran Duc
Phan, Long Ke
Pham, Van The
Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title_full Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title_fullStr Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title_full_unstemmed Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title_short Dichocarpum hagiangense—a new species and an updated checklist of Ranunculaceae in Vietnam
title_sort dichocarpum hagiangense—a new species and an updated checklist of ranunculaceae in vietnam
topic Biodiversity
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7518158/
https://www.ncbi.nlm.nih.gov/pubmed/33024628
http://dx.doi.org/10.7717/peerj.9874
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