A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)

A cryptic invader of the genus <i>Persicaria</i> has recently increased in the damper, northern parts of La Palma and Gran Canaria in the Canary Islands (Spain) and locally behaves as an invasive species. Examination of historical herbarium specimens showed this species to be present in...

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Autores principales:	Filip Verloove, Rainer Otto, Steven Janssens, Sang-Tae Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Canary Islands cryptic invasion molecular phylogeny new combination nomenclature <i>Persicaria</i> Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/a2f6e622c81f42aeb92e82c3116ec0b1
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spelling	oai:doaj.org-article:a2f6e622c81f42aeb92e82c3116ec0b12021-11-25T17:22:35ZA Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)10.3390/d131105511424-2818https://doaj.org/article/a2f6e622c81f42aeb92e82c3116ec0b12021-10-01T00:00:00Zhttps://www.mdpi.com/1424-2818/13/11/551https://doaj.org/toc/1424-2818A cryptic invader of the genus <i>Persicaria</i> has recently increased in the damper, northern parts of La Palma and Gran Canaria in the Canary Islands (Spain) and locally behaves as an invasive species. Examination of historical herbarium specimens showed this species to be present in Gran Canaria since the 1960s and the same probably applies to La Palma. Up to now, this species had been assigned to the Old World weed <i>P. maculosa</i>. However, morphologically, these plants clearly correspond with <i>P. hydropiperoides</i>, a common and widespread weed native to the New World, and indeed morphologically similar to <i>P. maculosa</i>. Diagnostic features for these two species, as well as for another similar species (<i>P. decipiens</i>, originally described from the Canary Islands), are compared, thoroughly discussed, and copiously illustrated. The current distribution, ecology, and naturalization status of <i>P. hydropiperoides</i> in the Canary Islands are also assessed. The variability of <i>P. hydropiperoides</i> is discussed, more precisely the taxonomic position of a southern ‘race’ of it that is sometimes referred to as a distinct species, <i>P. persicarioides</i>, and to which the Canarian plants belong. The taxonomic value of the latter appears to be clear, although at a lower level. A new combination, at varietal rank, is proposed and validated. In addition to our morphology-based study, a molecular phylogenetic analysis has been conducted on the nuclear ITS region and the plastid DNA region <i>trnL-F</i>.Filip VerlooveRainer OttoSteven JanssensSang-Tae KimMDPI AGarticleCanary Islandscryptic invasionmolecular phylogenynew combinationnomenclature<i>Persicaria</i>Biology (General)QH301-705.5ENDiversity, Vol 13, Iss 551, p 551 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Canary Islands cryptic invasion molecular phylogeny new combination nomenclature <i>Persicaria</i> Biology (General) QH301-705.5
spellingShingle	Canary Islands cryptic invasion molecular phylogeny new combination nomenclature <i>Persicaria</i> Biology (General) QH301-705.5 Filip Verloove Rainer Otto Steven Janssens Sang-Tae Kim A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
description	A cryptic invader of the genus <i>Persicaria</i> has recently increased in the damper, northern parts of La Palma and Gran Canaria in the Canary Islands (Spain) and locally behaves as an invasive species. Examination of historical herbarium specimens showed this species to be present in Gran Canaria since the 1960s and the same probably applies to La Palma. Up to now, this species had been assigned to the Old World weed <i>P. maculosa</i>. However, morphologically, these plants clearly correspond with <i>P. hydropiperoides</i>, a common and widespread weed native to the New World, and indeed morphologically similar to <i>P. maculosa</i>. Diagnostic features for these two species, as well as for another similar species (<i>P. decipiens</i>, originally described from the Canary Islands), are compared, thoroughly discussed, and copiously illustrated. The current distribution, ecology, and naturalization status of <i>P. hydropiperoides</i> in the Canary Islands are also assessed. The variability of <i>P. hydropiperoides</i> is discussed, more precisely the taxonomic position of a southern ‘race’ of it that is sometimes referred to as a distinct species, <i>P. persicarioides</i>, and to which the Canarian plants belong. The taxonomic value of the latter appears to be clear, although at a lower level. A new combination, at varietal rank, is proposed and validated. In addition to our morphology-based study, a molecular phylogenetic analysis has been conducted on the nuclear ITS region and the plastid DNA region <i>trnL-F</i>.
format	article
author	Filip Verloove Rainer Otto Steven Janssens Sang-Tae Kim
author_facet	Filip Verloove Rainer Otto Steven Janssens Sang-Tae Kim
author_sort	Filip Verloove
title	A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
title_short	A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
title_full	A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
title_fullStr	A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
title_full_unstemmed	A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)
title_sort	cryptic invader of the genus <i>persicaria</i> (polygonaceae) in la palma and gran canaria (spain, canary islands)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a2f6e622c81f42aeb92e82c3116ec0b1
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A Cryptic Invader of the Genus <i>Persicaria</i> (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)

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