Synonyms and Alternate Names: Physcomitrium australe E. Britton Physcomitrium californicum E. Britton Physcomitrium drummondii E. Britton Physcomitrium kellermanii E. Britton Physcomitrium kellermanii var. drummondii (E. Britton) Grout Physcomitrium megalocarpum Kindb. Physcomitrium megalocarpum var. californicum (E. Britton) Grout Physcomitrium pyriforme var. serratum (Renauld & Cardot) H.A. Crum & L.E. Anderson Physcomitrium turbinatum (Michx.) E. Britton, nom. illeg., non Müll. Hal. ex Lesq. & James Physcomitrium turbinatum (Michx.) E. Britton f. australe (E. Britton) Grout Physcomitrium turbinatum Müll. Hal. ex Lesq. & James Physcomitrium turbinatum (Britt.) Grout Physcomitrium turbinatum var. langloisii (Renauld & Cardot) E. Britton