Andreaea megistospora

B. M. Murray

Bryologist 90: 18, figs. 9–23, 25–28. 1987,.

Synonyms: Andreaea megistospora var. epapillosa (B. M. Murray) H. A. Crum & L. E. Anderson Andreaea megistospora subsp. epapillosa B. M. Murray
Treatment appears in FNA Volume 27. Treatment on page 106. Mentioned on page 103, 109.

Plants brown to black. Leaves erect-spreading or secund, subulate-lanceolate from an ovate base, widest in proximal half of leaf, apex symmetric; costa present, percurrent and sometimes filling the leaf apices, strong but narrow, bulging abaxially, usually reaching the leaf insertion; leaf margins entire or occasionally weakly crenulate; basal laminal cells quadrate to short-rectangular, marginal cells mostly roundedquadrate, walls weakly pitted-sinuose; medial laminal cells roundedquadrate, 1-stratose or 2-stratose in patches or completely, lumens rounded; laminal papillae smooth to papillose. Sexual condition cladautoicous or gonioatoicous; perichaetial leaves differentiated, convolute-sheathing. Spores (40–) 50–90 (–110) µm.

Habitat: Acidic rock
Elevation: low to moderate elevations


V27 119-distribution-map.gif

B.C., Alaska, Wash., nw Europe


Andreaea megistospora is distinguished from the similar A. rothii by its large spores, and may simply prove to be a large form of the latter. The variety epapillosa is a minor variant commonly occurring in mixture with the typical variety, and doubtfully warrants a name.

Selected References


Lower Taxa


"widest" is not a number.

... more about "Andreaea megistospora"
Richard H. Zander +
B. M. Murray +
ending before the apex +, percurrent +  and branched +
campanulate-mitrate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
distinct +
differentiated +
B.C. +, Alaska +, Wash. +  and nw Europe +
low to moderate elevations +
filamentous +
Acidic rock +
dioicous +, cladautoicous +, autoicous +  and sexual +
cladautoicous +  and sexual +
subulate-lanceolate +
rounded +
recurved +  and incurved +
roundedquadrate +
2-stratose +  and 1-stratose +
tetrahedral +, oval +  and spheric +
small;large +
elongate +
Andreaea megistospora var. epapillosa +  and Andreaea megistospora subsp. epapillosa +
Andreaea megistospora +
Andreaea +
species +
pitted-sinuose +
transverse +  and longitudinal +
thin +  and thick +