The flora of 984 species,147 genera of Orchidaceae from 38 regions of China as well as the tendency of R/T (tropical/temperate character) value with the latitudes were analyzed.All the flora types were clustered with SPSS 20.0.The results revealed that:(1)147 genera can be categorized into 11 types and 9 subtypes,and its 984 species into 12 types and 6 subtypes.(2)At generic level,the R/T values decreased along with the increase of the latitude in general,and 23 regions are tropical,13 regions are temperate,and the other two regions-Emei Mountain and Jinfo Mountain,are equal with tropical and temperate character.Whereas,at species level,the R/T values of all other regions just decreased in response to the increase of the latitudes and show a very strong tendency of latitudinal direction zonality,except for Erxianling,where has the most obvious tropical character due to its unique limestone geology.(3)There is a significant differentiation of the areal-type between genera and species.The Tropical Asia (24.71%),North Temperate (19.14%),and Tropical Asia to Tropical Australia (15.32%) are the top three areal-types among all the 147 genera of Orchidaceae in these 38 regions.But in contrast,besides the Tropical Asia (30.28%),the rest two main areal-types among the 984 species of Orchidaceae are the Endemic to China (26.89%) and the Sino-Japan (12.85%).(4)The cluster analyses indicate that species level is better than the genera level in understanding that the nearer the geographical latitude is,the more similar the flora should have.