Morphology, phylogeny, and taxonomy of Microthlaspi (Brassicaceae: Coluteocarpeae) and related genera

摘要: The genus Thlaspi has been variously subdivided since its description by Linnaeus in 1753, but due to similarities fruit shape several segregates have still not gained broad recognition, despite the fact that they are directly related Thlaspi. This applies especially now considered belong tribe Coluteocarpeae, which includes well-studied taxa, e.g., Noccaea caerulescens (syn. caerulescens), and widespread Microthlaspi perfoliatum perfoliatum). taxonomy of this is debated, as a series detailed monographs on Coluteocarpeae was published English lack phylogenetic resolution within found previous studies. current study presents investigations critical review morphological features, with focus taxa previously placed Microthlaspi. Based one nuclear (ITS) two chloroplast (matK, trnL-F) loci, four strongly supported major groups were recovered among genera included, corresponding Ihsanalshehbazia gen. nov., Friedrichkarlmeyeria s.str., s.l. In addition, new species Microthlaspi, M. sylvarum-cedri sp. nov. mediterraneo-orientale discovered, well both molecular data. Furthermore, erraticum comb. (diploid) s.str. (polyploid) shown be distinct species, phylogenetically widely separate, some overlap characters. Detailed descriptions, notes taxonomy, geographical distribution, line drawings for each included provided. taxonomic state briefly discussed it concluded while annual clearly from Noccaea, many perennial after thorough investigations, may merged genus.