Generic concepts in Bidens and Coreopsis (Compositae): an overview

Tadesse, Mesfin; Crawford, Daniel J.; Smith, Edwin B.

doi:10.1007/978-94-009-0285-5_63

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…The taxonomy of Coreopsideae Lindl. has been controversial since the original description of its main genera, Bidens L. and Coreopsis L. Tadesse et al (1996) stressed that the main diagnostic characters traditionally used to delimit these genera (achene awns and wings) are unreliable because of the presence of intermediate states and geographic disparity; the differences in plant habit were used to support the other characters. Many studies (e.g.…”

Section: Taxon Treatmentsmentioning

confidence: 99%

The first checklist of alien vascular plants of Kyrgyzstan, with new records and critical evaluation of earlier data. Contribution 1

Sennikov¹,

Lazkov²

2021

BDJ

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National checklists of alien plants and detailed databases of non-native plant occurrences are required to study and control regional and global plant invasions. No country in Central Asia has a national checklist of alien plants. A recent inventory counted 183 alien plant species in Kyrgyzstan, including archaeophytes and neophytes, established and casual. This preliminary checklist, which was developed for the Global Register of Introduced and Invasive Species in 2018, served as a starting point for the present study. A complete inventory of Xanthium in Kyrgyzstan has revealed that three alien species are resident in the country. Their correct nomenclature is X. orientale (syn. X. albinum, X. californicum, X. sibiricum auct.; invasive neophyle of the period of extensive grain import to the USSR after the Second World War), X. spinosum (invasive neophyte of the period of the Second World War, which arrived as a contaminant on the relocated livestock) and X. strumarium (syn. X. chinense, X. sibiricum; archaeophyte of the Neolithic period, introduced with wheat cultivation, which had lost its invasive status and appeared on the verge of extinction when its pool was no longer renewed by contaminated grain). A history of introduction to Central Asia is uncovered for all the species of Xanthium. A further spread is documented for Bunias orientalis, with a new record extending its distribution to the Eastern Tian-Shan; a complex history of its introduction to Europe and Central Asia is inferred from the archaeological data and its recent dispersal, and the pathways of its introduction to Kyrgyzstan are established. Erigeron annuus s.str. is reported as new to Kyrgyzstan and Uzbekistan, and E. lilacinus as new to Kyrgyzstan, Uzbekistan, Kazakhstan, Nepal and Tajikistan (it was previously recorded as E. annuus s.l. from the three latter countries, in which the presence of E. annuus s.str. is not confirmed). These closely related species differ in their pathways of introduction and invasion status: E. annuus s.str. is an invasive established alien which was imported as a contaminant of forage, whereas E. lilacinus is mostly a casual (locally persisting) alien introduced with contaminated seed of ornamental plants or nursery material, and also intentionally introduced and locally established in the Botanical Garden in Bishkek. Bidens tinctoria (syn. Coreopsis tinctoria) is newly recorded as a casual alien from a single locality in Kyrgyzstan; this species name is validly published here in conformity with the phylogeny of Coreopsideae. Point maps of species distributions in Kyrgyzstan are provided on the basis of a complete inventory of the literature data, herbarium specimens and documented observations, and our recent fieldwork. The maps are documented with a dataset of herbarium specimens and observations. Period and pathways of introduction, vectors of dispersal, current and historical invasion status, evidence of impact and distributional trend are established or inferred for each species. Each species is discussed in the context of plant invasions in Central Asia as a whole. These species accounts are part of the national database of alien plants which aims at producing a comprehensive overview and analysis of plant invasions in Kyrgyzstan.

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Section: Taxon Treatmentsmentioning

confidence: 99%

The first checklist of alien vascular plants of Kyrgyzstan, with new records and critical evaluation of earlier data. Contribution 1

Sennikov¹,

Lazkov²

2021

BDJ

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“…Polynesian Bidens, and archipelago-level radiations Within the Coreopsideae, the evolutionary relationships of the taxa in the two largest genera, Bidens and Coreopsis, have been particularly problematic and difficult to reconstruct (e.g., Ganders & Nagata, 1990;Kim et al, 1999;Tadasse, 1984Tadasse, , 1986Tadasse, , 1993Tadesse et al, 1995Tadesse et al, , 1996Tadesse et al, , 2001). In line with previous assessments, we recover Bidens s.l.…”

Section: Testing the Monophyly Of Bidens And Coreopsismentioning

confidence: 99%

Dispersal and adaptive radiation of Bidens (Compositae) across the remote archipelagoes of Polynesia

Knope

Funk

Johnson

et al. 2020

J of Sytematics Evolution

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The genus Bidens (Compositae) comprises c. 230 species distributed across five continents, with the 41 Polynesian species displaying the greatest ecomorphological variation in the group. However, the genus has had a long and complicated taxonomic history, and its phylogenetic and biogeographic history are poorly understood. To resolve the evolutionary history of the Polynesian Bidens, 152 individuals representing 91 species were included in this study, including 39 of the 41 described species from Polynesia. Four chloroplast and two nuclear DNA markers were utilized to estimate phylogenetic relationships, divergence times, and biogeographic history. Bidens was found to be polyphyletic within Coreopsis, consistent with previous assessments. The Polynesian radiation was resolved as monophyletic, with the initial dispersal into the Pacific possibly from South America to either the Hawaiian or Marquesas Islands. From the Marquesas, Bidens dispersed to the Society Islands, and ultimately to the Austral Islands. The initial diversification of the crown group in the Pacific is estimated to have occurred 1.63 mya (0.74-2.72, 95% HPD), making Polynesian Bidens among the youngest and most rapid plant diversification events documented in the Pacific. Our findings suggest that relatively rare long-distance dispersal and founder-event speciation, coupled with subsequent loss of dispersal potential and within-island speciation, can explain the repeated and explosive adaptive radiation of Bidens throughout the archipelagoes of Polynesia.

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A new species of Coreopsis (Compositae — Heliantheae) from Mexico

Tadesse

1999

Nordic Journal of Botany

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Generic concepts in Bidens and Coreopsis (Compositae): an overview

Cited by 5 publications

References 18 publications

The first checklist of alien vascular plants of Kyrgyzstan, with new records and critical evaluation of earlier data. Contribution 1

The first checklist of alien vascular plants of Kyrgyzstan, with new records and critical evaluation of earlier data. Contribution 1

Dispersal and adaptive radiation of Bidens (Compositae) across the remote archipelagoes of Polynesia

A new species of Coreopsis (Compositae — Heliantheae) from Mexico

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