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Malaxideae is a larger cosmopolitan orchid tribe consisting of nearly 2 000 species and is distributed world-wide,excluding the polar and desert regions, tt is abundant in the tropical regions, particularly in Australia, and the tropical Asia, Southeast Asia, the tropical Americas and Africa. Molecular and morphological analyses have been performed to establish the phylogenetic relationships within this tribe. However, the subtribe and intergeneric relationships remain unclear, and the genus definition of this tribe is considerably controversial. The maximum parsimony, maximum likelihood and Bayesian inference analyses were performed based on the combined sequences of the nuclear ITS and chloroplatt matK genes of 133 taxa (10 other allied species as outgroups), which represent nearly all of the major genera of the Malaxideae. These results suggested that Malaxideae could be divided into three clades, the epiphytic Oberoniinae, the terrestrial Liparidinae, and a terrestrial Crepidium clade. The Oberoniinae and Liparidinae could be divided into six genera and five genera respectively, and Crepidium clade camposes of four genera. The subtribe Ypsilorchidinae should be attributed to Oberoniinae. Disticholiparis should be removed because it shared the same type with. The phylogenetic relationship of Crepidium and Dienia is monophyletic. although they have different lip structures. In addition, two new species found in Southwest China and northern Vietnam. Platystyliparis malipoensis G. D. Tang .X . Y. Zhuang & Z. J . Liu and Cestichis pingtati G. D. Tang .X . Y. Zhuang & Z. J. Liu. were described based on the molecular analysis and morphological observation. [ABSTRACT FROM AUTHOR]