Stem leaves very shortly mucronate. Capsule stegocarpous, peristome absent or rudimentary. Spores smooth or tuberculate. Microbryum starckeanum var. Pottia fosbergii Bartr.
Stem leaves mucronate to short-awned.
Capsule cleistocarpous, peristome rarely differentiated internally, operculum absent or occasionally weakly differentiated. Spores both tuberculate and papillose. Microbryum starckeanum var. Ros et al. Distal laminal cells weakly convex superficially, adaxial surface of costa not mamillose.