Microbryum davallianum var. commutatum
Bull. Buffalo Soc. Nat. Sci. 32: 240. 1993,.
Capsule narrow-mouthed when dehisced, with usually 2 or more rows of thickened cells below mouth; peristome well developed though apically truncate. Spores papillose, 27–34 µm.
Phenology: Capsules mature late winter (Feb).
Elevation: low elevations
Calif., Europe, sw Asia, n Africa
Variety commutatum is known only from California (Berkeley, Howe 79, US), last collected in 1894, from which station it is disjunct to the Old World.