Search

The border area between south-eastern Yunnan, China and northern Vietnam is one of the regions with richest biological diversity including that of the fern genus Angiopteris (Marattiaceae). Based on the analysis of morphology and DNA sequences of multiple chloroplast regions (atpB, rbcL, rps4-trnS spacer and trnL-F spacer), we revised Angiopteris tonkinensis (Hayata) J.M.Camus and proposed a new combination Angiopteris tamdaoensis (Hayata) J.Y.Xiang & T.Wang, comb. nov., which was previously regarded as a synonym of A. tonkinensis. We found support for a monophyletic Angiopteris including Protomarattia. This discovery adds two new distribution sites of A. tonkinensis, one in China (Malipo, Yunnan) and one in Vietnam (Quan Ba, Ha Giang). We suggest A. tonkinensis should be categorised as Critically Endangered (CR) species according to the criteria of IUCN. [ABSTRACT FROM AUTHOR]

The article presents information on the genus Bolbitis (Dryopteridaceae) from Vietnam and Laos with a new species Bolbitis lanceolata. This genus was characterized by the anastomosing veins and creeping rhizomes. The Japanese genus Egenolfia was treated as a synonym of Bolbitis. The phylogeny of the bolbitidoid ferns was studied by two non-coding chloroplast spacers in 2010.