New insights into the phylogeny and infrageneric taxonomy of based on hybrid capture phylogenomics (Hyb-Seq).

is one of the largest and most rapidly evolving genera within the Asteraceae, comprising approximately 520 species from the Northern Hemisphere. A comprehensive infrageneric classification, supported by robust phylogenetic trees and corroborated by morphological and other data, has not yet been published. For the first time, we recovered a well-resolved nuclear phylogeny of consisting of four main clades, which was also supported by morphological data. Our analyses show that ancient hybridization is the most likely source of deep cytoplasmic-nuclear conflict in , and a phylogeny based on nuclear data is more suitable than one based on chloroplast data for exploring the infrageneric classification of . Based on the nuclear phylogeny obtained and morphological characters, we proposed a revised infrageneric taxonomy of , which includes four subgenera and 13 sections. Specifically, 1) . sect. , . sect. . sect. , and . sect. were moved from . subg. to . subg. , 2) . sect. was moved from . subg. to . subg. , and 3) . sect. was moved from . subg. to . subg. .