Microbryum starckeanum in Flora of North America @ efloras.org

1. Microbryum starckeanum (Hedwig) R. H. Zander, Bull. Buffalo Soc. Nat. Sci. 32: 240. 1993.

Weissia starckeana Hedwig, Sp. Musc. Frond., 65. 1801; Pottia starckeana (Hedwig) Müller Hal.

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.

Varieties 6 (3 in the flora): North Temperate Zone, disjunct to austral areas.

1 Capsules cleistocarpous (seldom operculum weakly differentiated but not dehiscent), spores both tuberculate and papillose, occasionally nearly smooth 1c Microbryum starckeanum var. fosbergii

+ Capsules stegocarpous, spores smooth or tuberculate (2)

2 (1) Peristome present, usually well-developed but truncate apically, leaves stoutly mucronate to short-awned 1a Microbryum starckeanum var. starckeanum

+ Peristome absent or rudimentary, leaves very shortly mucronate 1b Microbryum starckeanum var. brachyodus

Lower Taxa

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