A new fern species validated in Xishuangbanna

A complete species description and comparison to related species within the genus Hymenasplenium.


Hymenasplenium is one of two genera in the almost comprehensively distributed and species-rich greenery family Aspleniaceae. Analysts have recently perceived Hymenasplenium laterepens, a triploid taxon from China, but did not designate a type specimen.

Scientists from Xishuangbanna Tropical Botanical Garden (XTBG) collected and studied the triploid taxon at the classical place in Xishuangbanna.

To elucidate its ordered status, the scientists examined the morphological contrasts between the new species and related species and researched the refinement of the putative species.

They researched both chloroplast and nuclear DNA arrangements for the individuals from the monophyletic clade of the paleotropical Hymenasplenium genus.

Sub-atomic phylogenetic analyses and morphological observation of H. laterepens and related species obviously show that it is a distinct ordered element deserving of species rank.

Hymenasplenium laterepens is like H. apogamum. Be that as it may, H. laterepens has bigger triangular lamina, pinnae acute and all the more profoundly serrated on the edge, and long crawling rhizome with thicker roots.

H. laterepens is at present known to coincide with H. apogamum in southeastern China in soil or on rocks close streams in shaded forests at rising of 200– 800 m.

The sort example was gathered from Bubeng, Mengla County, Xishuangbanna, at a height of 580 meters and protected at Herbarium of XTBG.

The study is published in Phytotaxa.