New York State Liverworts and Hornworts: A Distributional Checklist by Counties

Abstract. Although there is a distributional list of mosses in New York State (Ketchledge 1980) no one has published a statewide liverwort or hornwort list. We have included all New York specimens from herbaria both in New York State and several other states, and from the 19th century to the present. We present here a list of liverworts and hornworts by county, with current nomenclature from Soderstrom et al. (2016) together with synonymy and doubtful and rejected taxa. We present the number of species per county and provide a firm basis for future records. In addition, there is a short history of liverwort exploration and collection in New York State. We report 205 taxa of liverworts and 7 taxa of hornworts.