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Phylogenetic relationships of Coronidium , Xerochrysum and several neglected Australian species of “ Helichrysum ” (Asteraceae: Gnaphalieae)
Author(s) -
Schmidt-Lebuhn Alexander N.,
Bruhl Jeremy J.,
Telford Ian R.H.,
Wilson Paul G.
Publication year - 2015
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.12705/641.5
Subject(s) - polyphyly , paraphyly , biology , monophyly , botany , genus , molecular phylogenetics , phylogenetic tree , clade , genetics , gene
A molecular phylogeny of selected Australian native Gnaphalieae (Asteraceae) is inferred from nuclear ribosomal ETS and ITS and chloroplast matK ‐ psbA , psbA ‐ trnH and ycf6 ‐ psbM sequences to test the reciprocal monophyly of the genera Coronidium and Xerochrysum and to taxonomically place several species currently treated as part of Helichrysum . Ribosomal and chloroplast phylogenies are topologically incongruent, but the latter are poorly resolved and poorly supported. Ribosomal and total evidence data suggest that the C . scorpioides group makes Coronidium in its current circumscription polyphyletic. Even without this species group, remaining Coronidium is inferred to be paraphyletic to Xerochrysum . Helichrysum macranthum and H . milligani are shown to be part of Xerochrysum and formally transferred to that genus. A lectotype is designated for H . milliganii . Helichrysum leucopsideum is shown to be affiliated with C . adenophorum and C . waddelliae while H . rutidolepis is confirmed to be part of the C . scorpioides group. In contrast, the affiliations of H . calvertianum , H . oligochaetum and H . pumilum cannot currently be resolved with confidence.