Abstract: ‘Xinyi'(辛夷) and ‘Mulan'(木兰) are Chinese traditional medicine and medicine species.Based the comparison on the antiquity literature,the type of Xinyi tree (Lassonia quinquepeta Buc'hoz) and the current distribution and culture of Xinyi and Mulan,author first infers that Xinyi tree is Yulania biondii (Pamp.) D.L.Fu (Magnolia biondii Pamp.),not Y.liliif lora (Desr.) D.L.Fu.Mulan tree may be Manglietia fordiana Oliv.or Michelia martinii (H.Lév.) Finet & Gagnep.ex H.Lév.,not Y.liliiflora (Desr.) also.To correct the view of that Xinyi is Mulan and Mulan is Y.liliiflora,as which most botanist and herbalist regarded now,will accelerate the research and development of Magnoliaceae.