The genus Plectocephalus comprises a single species in Ethiopia, two in North America and possibly four more in South America, in a striking disjunction that is exceptional for genera of the tribe Cardueae. Susanna et al. investigate the phylogeny and interpret the distribution as a migration via Siberia and the Bering Land Bridge in the late Miocene. Use of plastid markers reveals that previous phylogenies of Centaureinae based on nuclear ITS were flawed by the inconsistent response of the ITS to differences in mutation rates between annuals and perennials.
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January 5, 2015
Molecular phylogenetics of Eurasian Aster
The classification and phylogeny of Eurasian (EA) Aster remain poorly resolved. Li et al.Β use nrDNA ITS, and ETS and cpDNA trnL-F sequences to delimit EA Aster sensu stricto and to elucidate phylogenetic relationships...
August 26, 2012
Evolution, classification and biogeography of Velloziaceae
There is considerable discord among treatments of the Velloziaceae despite the large amount of data that exists for this family. Mello-Silva et al. undertake analyses of 48 species representing all ten genera, including...
June 27, 2011
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