Abstract
Herbarium specimens (c. 1 000) and population samples (76) have been screened for the occurrence of diploid representatives ofTaraxacum sect.Ruderalia (T. sect.Vulgaria, nom. illeg.). The area studied comprises German Democratic Republic, Poland, Czechoslovakia, Hungary and parts of Austria, Yugoslavia, and Rumania. Diploids are common from the Valley of the Moravia river on southwards. Isolated outpost localities are found in S. Poland and extend far to the north: neighbourhood of Berlin. Based on the pattern of distribution in Czechoslovakia, the Pannonian (thermophilous) phytogeographical character of the diploids is discussed. Special attention has been paid to morphological differences between di- and triploids in Czechoslovakia. The study provides a basis for further biosystematical and taxonomic studies in the relationships between diploids and polyploids as well as in the stability of agamospecies.
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den Nijs, J.C.M., Kirschner, J., Štěpánek, J. et al. Distribution of diploid sexual plants ofTaraxacum sect.Ruderalia in east-Central Europe, with special reference to Czechoslovakia. Pl Syst Evol 170, 71–84 (1990). https://doi.org/10.1007/BF00937850
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DOI: https://doi.org/10.1007/BF00937850