Lejeunea patersonii (Steph.) Steph. was reported for the first time from North Vietnam and Guangxi Province, China. The species is characterized by the orbicular leaves with crenulate margins; small, distant underleaves with indistinctly crenulate margins, 1-2 times stem width; leaf cell with smooth cuticle, cell walls with small trigones and without intermediate thickenings. Morphological descriptions and illustrations were provided, and a discussion was given for L. patersonii and its allies. The distribution of L. patersonii was recomfirmed by the correction of current confusing information.