Morphometric analysis provides evidence for two traditionally defined species of the Tillandsia erubescens complex (Bromeliaceae)

Background and aims – A linear morphometric analysis of three taxa the Tillandsia erubescens complex, composed T. var. arroyoensis , patentibracteata is presented to evaluate their circumscription. Additionally, taxonomic rank as varieties or species discussed considering obtained results. Geographic distribution, influence climate, elevation, geographic distance on morphological differences between entities explored. Material methods Of a total 110 herbarium specimens reviewed, 44 were measured. These previously identified . Factor cluster analyses performed using 16 quantitative characters. The resulting groups considered supported by characters, distributions plotted against Mexican biogeographic provinces. single Mantel test was correlation morphology climatic variables, distance. Key results referred separated morphometrically from other two varieties. most important characters differentiate size, width length leaf sheath blade, number flowers. non-overlapping geographical distribution supports recognition independent entities. Our study did not support separation which also reflected overlapping distributions. Both precipitation correlated with among species. Conclusion different species, while no evidence found maintain We provide set that can be used distinguish including blade width, Morphological agree studied taxa.