Distal laminal cells weakly convex superficially, adaxial surface of the costa not mammillose. Seta elongate. Capsule stegocarpous or occasionally cleistocarpous, cylindrical. Spores smooth or tuberculate (seldom also weakly papillose), 22–30 µm.

Distribution

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North Temperate Zone, disjunct to austral areas.

Discussion

Varieties 6 (3 in the flora).

Selected References

None.

Lower Taxa

Microbryum starckeanum var. brachyodus, Microbryum starckeanum var. fosbergii, Microbryum starckeanum var. starckeanum

Key

1	Capsules cleistocarpous (seldom operculum weakly differentiated but not dehiscent), spores both tuberculate and papillose, occasionally nearly smooth	Microbryum starckeanum var. fosbergii
1	Capsules stegocarpous, spores smooth or tuberculate	> 2
2	Peristome present, usually well-developed but truncate apically, leaves stoutly mucronate to short-awned	Microbryum starckeanum var. starckeanum
2	Peristome absent or rudimentary, leaves very shortly mucronate	Microbryum starckeanum var. brachyodus