The Lejeuneaceae, with about 1000 species in about 90 genera, is the largest family of liverworts (Marchantiophyta) and the most dominant group of the flora of tropical rainforests and subtropical natural forests. Owing to the largest number of species, difficulties in identification and sample collection (most species occur on tree trunks, branches or leaves), there is still no specific systematical study on Chinese Lejeuneaceae. Therefore, study on Chinese Lejeuneaceae's taxonomy has important significanc...