Abstract
During fieldwork to assess the status and ecology of Physcomitrium eurystomum Sendtn. in Britain, a naturally occurring sporophytic hybrid was found involving female Physcomitrium patens (Hedw.) Mitt. and male P. eurystomum, previously given the invalid name Physcomitrella amanni Głow. nom. nud. Recent authors have usually placed P. patens in Physcomitrella
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