Abstract: Liriodendron chinense is one of the genera with a disjunct pattern. It occurs mainly in subtropical China, with the latitude roughly from 22 to 32. 5 degrees, and the longitude roughly from 104. 5 to 1 19. 2 degrees. On a large scale, the distributive pattern trends to be aggregate. On a small scale, within a community it shows a tendency to be regular but occassionally aggregate. The Pattern analysis implies that the taxon ever reached a evolutional Peak historically, in spite of its prevailing tendency of phytogenetical declining recently. On the other hand, a few local population may still show evolutional potential. The modern range and distributive Pattern result from breaking of the formerly united and continuous range of Liriondendron. The possible reasons include: the Tertiary climate, paleogeology and evolution itself. The Tertiary climate characterized by cooling vs. warming fluctuation was a powerful dynamic agent. The existence of the Bering and other geographical events provided the Path and processes. Finally, the morphological and genetic divergence in the old genus were the source of this pattern development. On the basis of geographical analysis and pattern test, with the consideration of changing climate, changing geography, and evoluting biota, the author suggests that L. chinense and L. tulipifera are a pair of sister species. which may be derived from the near ancestors by allopatric speciation respectively.