2000/01/01 by M. G. Pimenov, E. V. Kijuykov, M. V. Leonov · 4 citations
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Plant chemical constituents analysis #Powdery Mildew Fungal Diseases #Plant Pathogens and Fungal Diseases
paper · doi:10.1002/fedr.20001110717
Abstract A critical evaluation of the taxonomic relationship of the species of Pleurospermum and related genera Hymenolaena, Trachydium, Aulacospermum, Keraymonia, Pterocyclus, Physospermopsis, Hymenidium , and Pleurospermopsis has been carried out. Eighty species, including all type species of these genera, were analysed using a large set of characters (47), mainly morphological (stem, leaf, umbel, flower and fruit traits). The species groupings were made using the UPGMA clustering method; the classification obtained is polythetic. The content of the genera and their circumscriptions have been drastically revised. Nine generic clusters have been revealed that correspond to Aulacospermum, Pseudotrachydium gen. nov., Trachydium, Physospermopsis, Keraymonia, Hymenolaena, Hymenidium s.l., Pleurospermum s.str. and Pterocyclus . For the largest assemblage of related species, formerly referred to diverse genera, the name Hymenidium , practically forgotten in current Umbelliferae nomenclature, has been restored. A key to the nine genera of Pleurospermum group is provided.