show Abstracthide AbstractMultiple origins of polyploids are now considered the rule, not the exception. However, how recurrent polyploidization events contribute to the genetic diversity of polyploids remains largely unknown. As a special case of recurrent polyploidy, the recently formed allotetraploid T. miscellus has formed reciprocally in nature with divergent inflorescence morphologies, i.e. short- vs. long-liguled forms. We reports the transcriptome diversity of the inflorescence that has resulted from reciprocal polyploidizations in T. miscellus.