Typification of some Asian Metzgeria (Metzgeriaceae) taxa described by Kuwahara

Yukinobu Kuwahara has described several Metzgeria taxa from Asia. However, most of these taxa have remained a mystery because their type specimens cannot be located in the herbarium where they were supposedly deposited in. This makes it difficult to effectively review the taxonomy of these taxa and Kuwahara's conception of the genus. In the present study, the unavailability of these types in NICH was formally investigated and addressed. These taxa are typified on the basis of newly located types or ordinary specimens identified by Kuwahara himself.