New and Rare Taxa of Lepidoziaceae (Marchantiophyta) in East Indochina (Southeast Asia)

Ongoing studies on the Lepidoziaceae in East Indochina have yielded new information on the distribution and morphology of a number of family representatives. This study aimed to provide new data in this regard. The latter task looks quite justified, taking into account the fact that East Indochina houses a notable portion of the worldwide Lepidoziaceae diversity, especially in the genus Bazzania. The materials for the paper were 48 specimens collected throughout East Indochina. The cited specimens contain 18 taxa, discussed in respect of their ecology, distribution, and morphology. All the taxa discussed in this paper are supplemented with illustrations, and their morphological descriptions based on the Indochinese materials are also included in most cases. One taxon (Bazzania appendiculata subsp. cambodiana subsp. nov.) is described as new-for-science. Six species are new to Indochina, three species are new to East Indochina, one species is new to Vietnam, and three species are new to Cambodia. A comparison of the currently known taxonomic diversity with that of Malaysia, which borders East Indochina, reveals that the diversity of Lepidoziaceae in East Indochina is still clearly understudied, and further research is likely to yield new discoveries. The final target in this field is the creation of a thorough taxonomic revision of the family in this region in the future.