New taxonomic treatments for three enigmatic scientific names of Taiwan fern flora

Based on the collections of U. Faurie from Formosa (i.e. Taiwan), E. Rosenstock published 40 new fern taxa in 1915. However, there are still some scientific names remaining enigmatic to date. Due to the reexaminations of their type specimens as well as the related protologues, three names are here identified and reduced to synonyms under different fern taxa. A fourth name remains ambiguous