During a survey of endophytic fungi in aquatic plants collected from Tibet, PR China, a novel species,
Ramichloridium endophyticum,was isolated from Potamogeton pectinatus. This novel species differs from other species of the genus Ramichloridiumby its finely verrucose, obovoid, ellipsoidal–obovoid and occasionally subglobose conidia. Phylogenetic analysis of the combined sequences of the internal transcribed spacers (ITS) and the translation elongation factor 1-alpha gene ( tef1-α) confirmed that the isolated strain represents a member of the genus Ramichloridium. A full description, illustrations and a phylogenetic tree showing the position of R. endophyticumare provided.