Abstract: This paper describes a new plant—Stachyophyton yunnanense gen. et sp. nov., from Posongchong Formation (Siegenian) of the Lower Devonian in Wenshan district, Yunnan, China. This plant shows some similar organization in fertile region and sterile parts in comparison with other Devonian genera (Protolepidodendron, Colpodexylon, Leclercqia, Enigmophyton, Krithodeophyton). It may be that the plant represents an intermediate stage in evolution between Enigmophyton and Krithodeophyton, and shows perhaps a certain affinity to lycopods. According to the salient features of Stachyophyton, it can not be, at present, placed in any group known in vascular plant. It can be assigned to definite position of taxon basing on much fossils record and further studies.