Tetraploid populations of Luzula multiflora subsp. multiflora (Juncaceae) in Europe

Two cytotypes are found within L. multiflora subsp. multiflora, the hexaploids being widely distributed throughout Europe while tetraploids rarely scattered in several relatively restricted areas in the mountains. Distribution of the tetraploids of L. multiflora subsp. multiflora in Europe is summarized; they are found in the Pyrenees, the Alps, the Massif Central and the Tatra Mts. The tetraploids are analysed morphologically and compared with other allied taxa and populations of the group by means of cluster analysis. The tetraploids are grouped according to their localities, and form a cluster of its own. Pattern of variation in the L. multiflora s. l. and geographical origin of the tetraploids are discussed.