Abstract
In 2020, Plagiothecium mauiense Broth. was recognised as a synonym of P. longisetum Lindb.; however, due to the inability to compare all known original material, the conducted taxonomic analysis was not completed with lectotypification of the name. Syntypes of P. mauiense were found in four American herbaria: Harvard University Herbarium (FH00220142), Miami University Herbarium (MU 000000546), New York Botanical Garden Herbarium (NY01256708) and Yale University Herbarium (YU 233890). Considering the condition of the found material and Articles 9.3, 9.11 and 9.12 of the International Code of Nomenclature for algae, fungi and plants (Shenzhen Code) that is currently in force, a specimen NY01256708 was proposed to be the lectotype of P. mauiense.