Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data

The Asplenium coenobiale complex is distributed in Eastern Asia and Southeast with its distribution center southwestern China. In this study, we carried out a detailed morphological, cytological, phylogenetic study by adding two samples from Danxia landform Guangdong. sequences of five chloroplast markers one nuclear marker the A. were analyzed maximum likelihood Bayesian inference, respectively. morphological analyses support recognition new species (A. danxiaense K.W.Xu sp. nov.) cave mountain, Guangdong province, southern This can be distinguished pulcherrimum having scales narrowly triangular to lanceolate, apex ending short apical tail, basal basiscopic pinnule usually largest, fertile segment scarce, exospore length more than 50 μm shows significant molecular differences other complex. A description illustrations are presented.