Notes on Adiantum juxtapositum (Adiantaceae) and Abrodictyum pluma (Hymenophyllaceae) for the Fern Flora of Vietnam

New original data on ecology and distribution of two rare ferns - Adiantum juxtapositum (Adiantaceae) and Abrodictyum pluma (Hymenophyllaceae) in Vietnam are provided. Detailed descriptions, illustrations and relevant taxonomic notes are also presented for both studied taxa.