%0 Journal Article %T Reproductive isolation and hybridization in sympatric populations of three Dactylorhiza species (Orchidaceae) with different ploidy levels %A De hert, Koen %A Jacquemyn, Hans %A Van Glabeke, Sabine %A Roldán-Ruiz, Isabel %A Vandepitte, Katrien %A Leus, Leen %A Honnay, Olivier %J Annals of Botany %V 109 %N 4 %P 709-720 %@ 0305-7364 %D 2012-03-19 %I Oxford University Press %~ DeepDyve