Microbryum davallianum var. commutatum

(Limpricht) R. H. Zander

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

Basionym: Pottia commutata Laubm. Deutschl. 1: 537, fig. 160. 1888
Synonyms: Pottia davalliana subsp. commutata (Limpricht) Podpera
Treatment appears in FNA Volume 27. Treatment on page 630.

Capsule narrow-mouthed when dehisced, with usually 2 or more rows of thickened cells below mouth; peristome well developed though apically truncate. Spores papillose, 27–34 µm.


Phenology: Capsules mature late winter (Feb).
Habitat: Soil
Elevation: low elevations

Distribution

V27 926-distribution-map.gif

Calif., Europe, sw Asia, n Africa

Discussion

Variety commutatum is known only from California (Berkeley, Howe 79, US), last collected in 1894, from which station it is disjunct to the Old World.

Selected References

None.

Lower Taxa

None.
elongate +, shortrectangular +  and quadrate +
weakly concave +  and broadly channeled +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
of 1;2 rows +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Limpricht) R. H. Zander +
round +  and semicircular +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
not differentiated +
Pottia commutata +
obovoid +
mitrate +  and conic-cucullate +
narrow-mouthed +
cleistocarpous +  and stegocarpous +
cylindrical +
synoicous +, paroicous +, monoicous +, sexual +  and asexual +
vesiculose +  and parenchymatous +
3 (?) +  and 6 (?) +
elongate-rhomboid +  and elongate +
enlarged +
tomentose +  and bare +
percurrent +  and excurrent +
serrulate +  and entire +
rhomboidal;shortrectangular;quadrate;hexagonal +
enlarged +  and small to somewhat +
Calif. +, Europe +, sw Asia +  and n Africa +
low elevations +
differentiated +
multicellular +
yellow +  and orange-red or red +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
spathulate +  and ovate +
reduced +
occasionally less papillose and somewhat thicker walled +
dentate +  and entire +
papillose +
photosynthetic +
branching +, hollow +  and simple +
1 +  and 6 +
flattened +  and 2-fid +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
Capsules mature late winter (Feb). +
1 (?) +  and 2 (?) +
not differentiated +
Bull. Buffalo Soc. Nat. Sci. +
straight +
elongate +
short;elongate +
2 +  and 1 +
red +  and laminal +
rounded-triangular +  and rounded-pentagonal +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Pottia davalliana subsp. commutata +
Microbryum davallianum var. commutatum +
Microbryum davallianum +
variety +
ovate;short elliptical +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
ovate +, elliptical +  and lanceolate +
yellow distally and red +, orange +, red +  and yellow +
rectangular +
stemless +  and perigoniate +
brown;reddish-brown +
plant +  and gregarious +
occasionally smaller than the perichaetiate +