Micromitrium megalosporum

Plants scattered or gregarious in usually sparse protonemata, yellow-green to orange-brown. Stems less than 0.2 mm. Leaves erect or spreading, broadly ovate-lanceolate and somewhat clasping at base, acuminate, 0.5–1.1 × 0.14–0.43 mm, margins usually ± incurved beyond the middle, entire proximally and distally entire to serrulate. Sexual condition synoicous. Capsule cleistocarpous or rarely dehiscing by a ring of differentiated cells distal to the equator, orange-brown, globose or slightly flattened, rarely broadly ovoid, with a short, broad apiculus; exothecial cells in 2 layers, stomates confined to distal half, sometimes absent. Spores fewer than 100, various shapes, proximal face only rarely concave, 55–83 × 37–67 µm, orange-brown.

Phenology: Capsules mature summer–winter, with some capsules persisting through spring with leaves intact or eroded.
Habitat: In sun or partial shade, unfertilized bare soil, sparsely vegetated turf
Elevation: low to moderate elevations (0-700 m)

Distribution

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Ark., Conn., Fla., Ga., La., Maine, Md., Mich., Miss., Mo., N.J., N.C., Pa., Wis., West Indies (Cuba), e Asia (Japan), Africa (Cameroon).

Discussion

Selected References

None.

Lower Taxa

None.