Speciation, Morphometrics, Hybridization, Molecular phylogeny, Ecological differentiation, Multivariate ordination, Systematic biology, Ontogeny, Gymnadenia, and Species circumscription

Speciation , Phylogeny , Morphology , Gymnadenia , Cladistics , trnL-F, Genus circumscription , Internal Transcribed Spacer, Species circumscription, Orchidaceae, and Character evolution

Conservation priorities, Allozymes, Dactylorhiza francis-drucei, Taxonomy, In situ morphometrics, Species circumscription, Scotland, Allopolyploidy, Evolutionary mechanisms, and DNA sequencing

Genetic bottleneck, Canada, Europe, Internal Transcribed Spacer, Dactylorhiza, Evolutionary mechanisms, Microsatellites, Taxonomy, In situ morphometrics, Species circumscription, Allopolyploidy, and Allozymes