通过比较桔梗科已有的大量细胞学资料认为该类群应该与风铃草属和沙参属所代表的类群关系较近。
By comparing with other cytological data of Campanulaceae , this species is probably tetraploid and the genus Homocodon maybe close to Campanula and Adenophora in phylogeny .
沙参属