Topic
Cotula
About: Cotula is a research topic. Over the lifetime, 40 publications have been published within this topic receiving 573 citations.
Papers
TL;DR: Twenty-five species from New Zealand, the Subantarctic islands, and South America are described and classified into two series, Elongata and Radiata.
Abstract: Summary The taxonomic position, status, and characters of Cotula, and its subdivision into three sections are briefly described Section Leptinella is considered a well-defined taxon and its characters and relationships are discussed Twenty-five species from New Zealand, the Subantarctic islands, and South America are described and classified into two series, Elongata and Radiata The following new taxa and names are described: series Oligoleima (from Australia and New Guinea), Elongata and Radiata; five new species, C dispersa, C serrulata, C calcarea, C intermedia, and C nana; two new names, C albida and C membranacea; five new combinations, C rotundata, C traillii subsp pulchella, C pectinata subsp villosa, C pectinata subsp willcoxii, and C pyrethrifolia var linearifolia; four new subspecies, C dispersa subsp rupestris, C dioica subsp monoica, C squalida subsp mediana, and C atrata subsp luteola
69 citations
TL;DR: The data support the conclusion that the ‘Cotuleae’ is an unnatural assemblage: Cotula, Leptinella, Nananthea and Soliva appear to form one close-knit group, and Dimorphocoma, Elachanthus and Isoetopsis another, while the remaining genera are highly diverse.
53 citations
TL;DR: A phylogenetic study based on nrDNA ITS and cpDNA ndhF sequence variation for a complete generic sampling of this S hemisphere group of the tribe Anthemideae with its paramount importance for the understanding of the evolutionary history of this plant group.
Abstract: Twenty-nine genera of the tribe Anthemideae (Compositae) (111 genera, ca. 1,800 species) are either restricted to or have their distributional centre in the S hemisphere. We here present a phylogenetic study based on nrDNA ITS and cpDNA ndhF sequence variation for a complete generic sampling of this S hemisphere group of the tribe with its paramount importance for the understanding of the evolutionary history of this plant group. Our results corroborate the paraphyletic nature of the S hemisphere group of Anthemideae as a whole and of the four subtribes (Ursiniinae, Gonosperminae, Thaminophyllinae, Matricariinae) erected by Bremer and Humphries (1993) to accommodate its members. We further show that the genus Osmitopsis and the Cotula- group hold a basal position in the tribe. Members of the subtribe Ursiniinae (that is characterised by the possession of anthers with polarised endothecial tissue) form a paraphyletic group that may, together with a strongly supported monophyletic group around the genus Pentzia, contain the sister group(s) of the Asian and Mediterranean clades of the tribe. As a consequence of the non-monophyletic nature of the subtribes according to Bremer and Humphries (1993), we discuss an alternative generic grouping of the S hemisphere Anthemideae.
45 citations
TL;DR: The results signify that the facilitative role of AMF communities in invasion by some alien plants is contingent upon neighbour identity and the present approach provides not only a framework for further examination of the invasive plant–soil biota feedback, but also many important management implications.
44 citations
TL;DR: The molecular data show that lineages within the clade of Mediterranean and Eurasian representatives characterized by a 17bp deletion in ITS2 diverged in the Middle Miocene and first efforts are made to date the diversification of members of the tribe based on sequence divergence rates.
Abstract: Oberprieler, C.: On the taxonomic status and the phylogenetic relationships of some unispecific Mediterranean genera of Compositae-Anthemideae I. Brocchia, Endopappus and Heliocauta. — Willdenowia 34: 39–57. — ISSN 0511-9618; © 2004 BGBM Berlin-Dahlem. Sequences of the nrDNA internal transcribed spacer (ITS) region and the cpDNA trnL/trnF intergenic spacer (IGS) region were analysed for 67 representative species of 54 genera of Compositae-Anthemideae to ascertain the systematic position of the three unispecific Mediterranean genera Brocchia, Endopappus and Heliocauta. For Brocchia cinerea, which was considered to be closely related to Cotula due to its 4-lobed corolla of disc florets, a position among Mediterranean genera clearly distinct from Cotula but with unresolved sister group relationships is demonstrated. For Endopappus macrocarpus a close relationship with Tripleurospermum was suggested due to similarities in achene morphology; the molecular data, however, support its position distinctly...
36 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 3 |
| 2020 | 1 |
| 2019 | 1 |
| 2017 | 2 |
| 2014 | 2 |
| 2013 | 2 |