Pikner, T., Mürk, M. & Oja, T. 2016.- Taxonomic status of Dactylorhiza ruthei and its relationship to other allotetraploid Dactylorhiza in the Baltic Sea region. Natural. belges 97 (Orchid. 29): 55-77.

Abstract. Pikner, T., Mürk, M. & Oja, T. 2016.- Taxonomic status of Dactylorhiza ruthei and its relationship to other allotetraploid Dactylorhiza in the Baltic Sea region. Natural. belges 97 (Orchid. 29): 55-77. The taxonomy and nomenclature of the Dactylorhiza ruthei was analysed by comparison of morphological, ecological and molecular data from all contemporary populations in Puhtu (Estonia), Suwalki (Poland) and Peenemünde (Germany). As the original population of D. ruthei from Swinemünde (Poland, former Germany) is declared being extinct, some DNA extracts has been acquired also from herbarium specimens of the original population. Three hypotheses were tested and concluded from the molecular and morphological data: (1) the three contemporary populations of D. ruthei are not closely related to each other and are distinct of the plants from the historical location in Swinemünde; (2) the population from Puhtu, Estonia, is considered as a separate taxon and the correct name at the specific rank is Dactylorhiza vironii Kreutz.; (3) the Suwalki populations (Poland) are closely related to D. baltica.


Key-Words:
Orchidaceae, Dactylorhiza ruthei, Dactylorhiza vironii, taxonomy, distribution area, morphology, allopolyploidy, hybridisation, genetic diversity, introgression, microsatellites, plastid DNA, ITS allele. Baltic flora.