Micromitrium wrightii

(Müller Hal.) Crosby

Bryologist 71: 116. 1968,.

Basionym: Ephemerum wrightii Müller Hal. Linnaea 43: 351. 1882
Synonyms: Nanomitrium wrightii (Müller Hal.) V. S. Bryan & L. E. Anderson
Treatment appears in FNA Volume 27. Treatment on page 649. Mentioned on page 647, 648, 653.

Plants scattered in abundant protonemata, green. Stems virtually absent. Leaves erect, linear-lanceolate, rarely with narrow, toothed shoulders, gradually and slenderly acuminate, 1–2 × 0.15–0.26 mm, margins plane, entire or with short single or double teeth distally. Sexual condition synoicous or dioicous. Capsule cleistocarpous or rarely dehiscing by a ring of differentiated cells distal to the equator, yellow to orangebrown, globose or slightly flattened, slightly apiculate; exothecial cells in 2 layers, stomates numerous and confined to proximal half. Spores fewer than 100, various shapes, proximal face not concave, 50–84 × 40–66 µm, redbrown or dark-brown.


Phenology: Capsules mature year around.
Habitat: Soil in shaded ravines, drying mud, clay in dry sloughs
Elevation: low elevations (0-100 m)

Distribution

V27 957-distribution-map.gif

La., Tex., West Indies (Cuba)

Discussion

Although the leaves of Micromitrium wrightii are most accurately described as ecostate, the largest leaves may have suggestions of a costa. Some have merely thick-walled cells in the median part of the leaf, and others may have ± 3 median, undifferentiated cells in a double layer.

Micromitrium wrightii is known from five or fewer localities.

Selected References

None.

Lower Taxa

None.
... more about "Micromitrium wrightii"
toothed +
ecostate +  and costate +
multicellular +
Virginia S. Bryan +
(Müller Hal.) Crosby +
Ephemerum wrightii +
0 +  and 2/3 +
torn +, lobed +, cucullate +  and mitrate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.016 cm0.16 mm <br />1.6e-4 m <br /> (?) +
yellow +  and orangebrown +
dehiscing +  and cleistocarpous +
0mm +  and 0.4mm +
flattened +  and globose +
thin-walled +
differentiated +
angled +, globose +  and reniform +
La. +, Tex. +  and West Indies (Cuba) +
low elevations (0-100 m) +
Soil in shaded ravines, drying mud, clay in dry sloughs +
dioicous +, synoicous +  and sexual +
1mm;2mm +
acuminate +  and linear-lanceolate +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.026 cm0.26 mm <br />2.6e-4 m <br />) +
with short single or double teeth +  and entire +
dioicous +, synoicous +  and sexual +
Capsules mature year around. +
swollen +  and elongate +
dark-brown +  and redbrown +
black;brown;black;brown;red;orange +
0 cm0 mm <br />0 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
superficial +
Nanomitrium wrightii +
Micromitrium wrightii +
Micromitrium +
species +