Abstract
This paper presents a re-evaluation of the taxonomic identity of Lecanorchis ohwii. Based on the original descriptions and type materials, we noticed that gross morphology of Lecanorchis ohwii could agree well with L. albida . Lecanorchis albida is also a taxonomically complicated species which was considered as a variety or a form of L. cerina , a variety or a synonym of L. kiusiana , a synonym of L. japonica or an independent species. After thorough study of type materials of L. ohwii and L. albida, we can confirm that L. ohwii is conspecific with L. albida but clearly distinguishable from other similar taxa such as L. cerina, L. japonica, and L. kiusiana. We thus treat L. albida as a later synonym of L. ohwii as the latter has priority at species rank. Furthermore, the isotype specimen in KYO is designated as the lectotype, because the holotype of L. ohwii has been lost possibly during the confusion after World War II.