Syntrichia ammonsiana

(H. A. Crum & L. E. Anderson) Ochyra

Fragm. Florist. Geobot. 37: 212. 1992,.

Basionym: Tortula ammonsiana H. A. Crum & L. E. Anderson Bryologist 82: 469. figs. 3–5. 1979
Treatment appears in FNA Volume 27. Treatment on page 623. Mentioned on page 618, 621.
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Stems 5–10 mm. Leaves infolded and twisted when dry, recurved when moist, broadly spatulate, 1.5–2.5 × 0.6–0.8 mm; margins plane, entire before but with a few teeth near the apex; apices acute; costa percurrent, yellow or brown, smooth; basal cells abruptly differentiated, narrower toward the margins; distal cells quadrate to hexagonal, 10–15 µm, bulging, with about 4 papillae per cell. Specialized asexual reproduction propagula borne on stalks in axils of distal leaves, leaf-like, 0.25–0.45 mm, green, papillose, costate. Sexual condition dioicous (perigonia and sporophytes unknown).


Habitat: Sandstone in deep shade
Elevation: moderate elevations

Distribution

V27 909-distribution-map.gif

N.C., Tenn., W.Va., South America (Peru), Africa (South Africa).

Discussion

Syntrichia ammonsiana can easily be distinguished from S. chisosa by its 1-stratose laminae.

Selected References

None.

Lower Taxa

None.