The leaf cells with several papillae on either free surface distinguish Crossidium seriatum from C . aberrans . A poorly preserved specimen from Kansas is perhaps a juvenile form with awned leaves and reduced filaments. J. Juratzka, Laubmfl. Tortula crassinervia G. De Notaris, Mem. J. Juratzka var.
Papillae are present on the apex of the terminal cell and, occasionally, on the distal leaf cells.
J. Juratzka, Laubmfl. 1882 Barbula squamifera D. Viviani, Ann. Europe, northern Africa, Canary Islands, Asia, India, United States, Mexico. North American specimens without sporophytes from Ariz., Calif., Colo. and Utah have been studied, but these cannot be satisfactorily referred to an infraspecific category. The type specimen of C .