Systematics of the Arctioid group: Disentangling Arctium and Cousinia (Cardueae, Carduinae)

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Abstract:

We investigated the phylogeny of the Arctioid lineage of the Arctium-Cousinia complex in an attempt to clarify the conflictive generic boundaries of Arctium and Cousinia. The study was based on analyses of one nuclear (ITS) and two chloroplastic (trnL-trnT-rps4, rpl32-trnL) DNA regions of 37 species and was complemented with morphological evidence where possible. Based on the results, a broadly redefined monophyletic genusArctium is proposed. The subgeneraHypacanthodes and Cynaroides are not monophyletic and are suppressed. In contrast, the traditional sectional classification of the genus Cousinia is maintained. The genera Anura, Hypacanthium and Schmalhausenia are reduced to sectional level.

Keywords: ANURA; ARCTIUM; COUSINIA; HYPACANTHIUM; ITS; MOLECULAR PHYLOGENY; NOMENCLATURE; RPL32-TRNL; SCHMALHAUSENIA; TRNL-TRNT-RPS4

Document Type: Research Article

Affiliations: Botanic Institute of Barcelona (CSIC-ICUB), Pg. del Migdia s. n., 08038 Barcelona, Spain

Publication date: April 1, 2011

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