Notes to the Taxonomic Affiliation of the Bulbophyllym Sect. Physometra (Orchidaceae, Epidendroideae) Based on Molecular Phylogenetic Analyses.

To solve the taxonomic affiliation of Bulbophyllum physometrum , the only known species of the Bulbophyllym sect. Physometra (Orchidaceae, Epidendroideae), we conducted phylogenetic analyses based on nuclear markers, i.e., ITS and the low-copy gene Xdh , and the plastid region mat K. We used Asian Bulbophyllum taxa, with a special focus on species from the sections Lemniscata and Blepharistes , i.e., the only Asian sections of this genus with bifoliate pseudobulbs, as in B . physometrum . Unexpectedly, the results of molecular phylogenetic analyses showed that B . physometrum is most probably more related to the representatives of the sections Hirtula and Sestochilos than Blepharistes or Lemniscata .