Microbryum davallianum

(Smith) R. H. Zander

Bull. Buffalo Soc. Nat. Sci. 32: 240. 1993,.

Basionym: Gymnostomum davallianum Smith Ann. Bot. (König & Sims) 1: 577. 1805
Synonyms: Pottia davalliana (Smith) C. Jensen
Treatment appears in FNA Volume 27. Treatment on page 629. Mentioned on page 628.

Distal laminal cells weakly convex superficially, adaxial surface of costa not mammillose. Seta elongate. Capsule cylindrical, stegocarpous but never cleistocarpous. Spores granulose, low-papillose or spiculose, large, 28–39 µm.


V27 924-distribution-map.gif

North America, Mexico, Europe, sw Asia, Africa, Pacific Islands (New Zealand).


Varieties 3 (3 in the flora).

Selected References



1 Capsules commonly wide-mouthed when dehisced, with a single row of thickened cells below mouth, peristome absent, spores spiculose, 31-39 µm. Microbryum davallianum var. davallianum
1 Capsules narrow mouthed when dehisced, with usually 2 or more rows of thickened cells below mouth, peristome variously absent or present, spores merely papillose, 27-34 µm > 2
2 Peristome well developed Microbryum davallianum var. commutatum
2 Peristome rudimentary or absent Microbryum davallianum var. conicum