Leucheria Lag. includes Polyachyrus Lag. (Asteraceae; Mutiseae; Nassauvieae)

Mark Hershkovitz

Leucheria, Polyachyrus, Oxyphyllum, Asteraceae, Mutiseae, Nassauvieae

Phylogenetic analysis of sequences from the nuclear ribosomal DNA internal transcribed spacer (ITS), plastome rpl32-trnL(UAA) intergenic spacer (rpl32-trnL), and plastome trnL(UAA) intron plus trnL(UAA)-trnF(GAA) intergenic spacer (trnL-trnF) demonstrates that the genus Polyachyrus Lag. is phylogenetically nested among species of Leucheria Lag. The data demonstrate that Leucheria and the monotypic Oxyphyllum Phil. share a unique common ancestor, but the present data cannot establish whether or not Oxyphyllum is sister to Leucheria. It appears as one of multiple unresolved lineages emerging from the Leucheria crown. The sister of this crown is a clade comprising Marticorenia Crisci and Moscharia Ruiz & Pav, with Spinoliva (Hook. & Arn.) G.Sancho, Luebert & Katinas being sister to all of these. The results demonstrate that secondary inflorescence heads of Polyachyrus and some Leucheria species are homologous rather than convergent, and that the ancestor of Leucheria occupied a warm, arid lowland rather than, as previously asserted, a cool, moist alpine/steppe habitat.

Published Paper   E-Certificate

"Leucheria Lag. includes Polyachyrus Lag. (Asteraceae; Mutiseae; Nassauvieae)", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.9, Issue 4, page no.636 - 646, April-2024, Available :https://ijsdr.org/papers/IJSDR2404088.pdf

Volume 9 Issue 4, April-2024

Pages : 636 - 646

Paper Reg. ID: IJSDR_210798

Published Paper Id: IJSDR2404088

Downloads: 000347253

Research Area: Biological Science

Country: Isla Negra, Valparaiso , Chile

Published Paper PDF: https://ijsdr.org/papers/IJSDR2404088

Published Paper URL: https://ijsdr.org/viewpaperforall?paper=IJSDR2404088

ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016

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Publisher: IJSDR(IJ Publication) Janvi Wave

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