Luisierella barbula

(Schwägrichen) Steere

Bryologist 48: 84. 1945,.

Basionym: Gymnostomum barbula Schwägrichen Sp. Musc. Frond. Suppl. 2(2,1): 77, plate 175. 1826
Treatment appears in FNA Volume 27. Treatment on page 642.

Plants inconspicuous, nearly stemless. Stems mostly unbranched, rhizoids or tomentum not evident. Leaves rosulate, 1–1.5 (–2) mm, younger leaves nested in a rosette of older leaves, which extends to 1/2 the length of the younger leaves; distal laminal cells deep green in sharp contrast with colorless proximal cells region, irregularly rounded-hexagonal, 8–11 µm. Sexual condition with bulbous vaginula; antheridia tiny, 1/3 the length of the archegonia; plants with only perigonia not seen. Capsule 1–2.5 mm; operculum 0.6–1 mm; peristome teeth short, irregular, sometimes appearing absent.


Phenology: Capsules mature late fall through winter (occasionally to March).
Habitat: Calcareous rocks, moist to mesic sites, sinkholes and other limestone substrate (a gravestone)
Elevation: low elevations

Distribution

V27 948-distribution-map.gif

Ala., Fla., Ga., Tex., Mexico, West Indies, Central America (Belize), South America (Brazil), Asia (Indonesia), Asia (Japan)

Discussion

Luisierella barbula usually grows in a thin crust associated with cyanobacteria, Hyophiladelphus agrarius, and Weissia jamaicensis, the minute black plants contrasting starkly with the usually chalky white rock surface. The somewhat elevated cells on the adaxial surface of the costa may resemble a differentiated structure (a pad of cells), but the cells appear to be otherwise undifferentiated from those of the lamina.

Selected References

None.

Lower Taxa

None.
... more about "Luisierella barbula"
elongate +  and quadrate +
vesiculose +  and compound +
of 1-2 rows +  and differentiated +
insertion +
erect-incurved +
differentiated +
v--shaped +
Patricia M. Eckel +
(Schwägrichen) Steere +
semielliptic +  and semicircular +
oblong-rectangular +  and inflated +
papillose +  and smooth +
usually slightly wider +
insertion +
erect-incurved +
rounded-obtuse;obtusely acute +
differentiated +
Gymnostomum barbula +
obovoid +
cucullate +
stegocarpous +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
monoicous +, dioicous +  and sexual +
flat to bulging +
vesiculose +  and thick-walled +
4 (?) +  and 5 (?) +
roundedquadrate +
tomentose +  and bare +
subpercurrent +
Ala. +, Fla. +, Ga. +, Tex. +, Mexico +, West Indies +, Central America (Belize) +, South America (Brazil) +, Asia (Indonesia) +  and Asia (Japan) +
low elevations +
differentiated +
multicellular +
Calcareous rocks, moist to mesic sites, sinkholes and other limestone substrate (a gravestone) +
yellow +  and orange-red or red +
erect-incurved +
rounded-obtuse +  and obtusely acute +
differentiated +
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 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
younger +  and older +
spathulate +  and ovate +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
erect-incurved +
rounded-obtuse +  and obtusely acute +
differentiated +
high-conic +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
undifferentiated +
photosynthetic +
compound +, simple +, hollow +  and solid +
flattened +  and 2-fid +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
0-500 um +  and rudimentary +
lanceolate +  and linear +
Capsules mature late fall through winter (occasionally to March). +
straight +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
elongate +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 +  and 1 +
light yellow +  and orange +
rounded-triangular +  and rounded-pentagonal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Luisierella barbula +
Luisierella +
species +
cylindric +
yellow distally and red +, orange +, red +  and yellow +
specialized +
sexual +  and asexual +
synoicous +, fertile +  and gynodioicous +
occasionally smaller than the perichaetiate +