Microbryum davallianum var. davallianum

Synonyms: Pottia starckeana subsp. minutulum (Schwägrichen) D. P. Chamberlain
Treatment appears in FNA Volume 27. Treatment on page 630.

Capsule commonly wide-mouthed when dehisced, with a single row of thickened cells below mouth; peristome absent. Spores spiculose (finely spinose) and large (31–39 µm.).


Phenology: Capsules mature late summer to early winter (Sept-Nov).
Habitat: Bare soil, vacant lots, fields
Elevation: low to moderate elevations

Distribution

V27 925-distribution-map.gif

Ont., Mich., N.Y., Europe, sw Asia, n Africa, Pacific Islands (New Zealand)

Discussion

In var. davallianum the spines of the spores are 2–2.5 µm. Distal laminal papillae are hollow or occasionally solid, ca. 2 per lumen, usually simple but in some specimens (e.g., Ontario, Bruce County, C. Williams 1200, CANM) mostly 2-fid and hollow (with a distinct saddle between the projections) and distinctly C-shaped in optical section.

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 +
(Smith) R. H. Zander +
round +  and semicircular +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
not differentiated +
Gymnostomum davallianum +
obovoid +
mitrate +  and conic-cucullate +
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 +
Ont. +, Mich. +, N.Y. +, Europe +, sw Asia +, n Africa +  and Pacific Islands (New Zealand) +
low to moderate elevations +
differentiated +
multicellular +
Bare soil, vacant lots, fields +
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 summer to early winter (Sept-Nov). +
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 starckeana subsp. minutulum +
Microbryum davallianum var. davallianum +
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 +