Taxonomic notes and range extension of the monospecific genus Ramudaria (Lophocoleaceae, Marchantiophyta) endemic to India

Ramudaria is a monospecific genus well-characterized by the longitudinal, serially arranged lamelliform strips on the surface of the stem. This character seems to be unique amongst the leafy liverworts. Ramudaria lamellicaulis is so far known only from Arunachal Pradesh and Sikkim in the Eastern Himalaya, India. The species is reported here for the first time for China. The locality recorded here for China is the northernmost and highest in altitude. A description and illustrations of R. lamellicaulis based on the Chinese specimen are provided, along with a distribution map. A discussion about the status of such a morphologically remarkable genus is presented and an author citation of Ramudaria is corrected.