Roegneria yenchiana: A new species in the Triticeae (Poaceae) from the Hengduan Mountain region

Roegneria yenchianasp. nov. (Triticeae) is a new species collected from Shangri-la of Yunnan Province in China based on morphological, cytological, and molecular data. It is morphologically characterized by one spikelet per node, rectangular glums, awns flanked by two short mucros in lemmas, distinguished from other species ofRoegneria. The genomic in situ hybridization results indicate thatR. yenchianais an allotetraploid, and its genomic constitution isStY. Phylogenetic analyses based on multiple loci suggested thatR. yenchianais closely related toPseudoroegneriaandRoegneria,and thePseudoroegneriaserved as the maternal donors during its polyploid speciation.