Pleurochaete luteola

(Bescherelle) Thériot

Smithsonian Misc. Collect. 78(2): 14. 1926,.

Basionym: Trichostomum luteolum Bescherelle Mém. Soc. Natl. Sci. Nat. Cherbourg 16: 178. 1872
Treatment appears in FNA Volume 27. Treatment on page 498. Mentioned on page 497.

Cauline leaves (2–) 3–4.5 mm; basal hyaline marginal band regularly sharply and irregularly denticulate distally, extending 1/2–3/4 the length of the leaf, evident on leaves on dry stems as a shining, undulate area above the edge of the subtending leaf, depauperate stems with leaves to 2 mm show the hyaline band to at least 1/4 the leaf length, and usually on some leaves nearly 1/2; hyaline cells of band smooth distally, the cells elongate and becoming shortrectangular distally; longest median basal-cells 7–10: 1; median laminal cells ca. 7 µm wide, quadrate.


Habitat: Not fruiting in the flora area. Exposed clay or sandy soil over calcareous rock, especially in cedar barrens or glades, dry bluffs, ledges
Elevation: low to moderate elevations

Distribution

V27 720-distribution-map.gif

Ala., Ariz., Ga., Miss., Mo., N.Mex., Okla., Tenn., Tex., Va., Mexico, West Indies (Cuba), West Indies (Dominican Republic), West Indies (Haiti), Central America (Guatemala), South America (Colombia), South America (Ecuador), South America (Peru)

Discussion

The length of the limbidium does not generally correlate with stem robustness or leaf length, as discussed by various authors, such as E. B. Bartram (1949), although it is naturally shorter in depauperate material, extensively displayed in Texas specimens with stems and leaves of low stature. Undulations in the leaf base proximal to the limb may give the appearance of a leaf shoulder, but there is no abrupt narrowing of the leaf in this region, as there is in Pseudosymblepharis, which narrows abruptly here, forming a shoulder above the clasping leaf base. Both genera display porose basal cells, near the costa, but in Pleurochaete this feature is not as conspicuous. In Texas, both definitive P. luteola and large series of depauperate specimens occur. The latter were all in exposed situations on open soil, and the limbidium was indeed relatively short on these very short-stemmed and short-leaved specimens (1/4–1/2 the leaf length). Still, these specimens, although the most reduced in typical New World characters, have stronger borders than typical material of P. squarrosa from the Old World.

Selected References

None.

Lower Taxa

None.

"some" is not a number."narrower" is not a number.

... more about "Pleurochaete luteola"
elongate +  and quadrate +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
mucronate +, short-aristate +  and acuminate +
undulate +
Patricia M. Eckel +
(Bescherelle) Thériot +
pointed +
reniform +  and rounded +
papillose +  and smooth +
usually slightly wider +
tapering;oblong-ovate +
Trichostomum luteolum +
obovoid +
mitrate +  and cucullate +
cleistocarpous +  and stegocarpous +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
monoicous +, dioicous +  and sexual +
flat to bulging +
thin-walled +
specialized +
0 +  and few +
papillose +
dioicous +, sexual +  and asexual +
elongate +
large +  and small +
widest +  and wide +
tomentose +  and bare +
elongate +
subquadrate +
Ala. +, Ariz. +, Ga. +, Miss. +, Mo. +, N.Mex. +, Okla. +, Tenn. +, Tex. +, Va. +, Mexico +, West Indies (Cuba) +, West Indies (Dominican Republic) +, West Indies (Haiti) +, Central America (Guatemala) +, South America (Colombia) +, South America (Ecuador) +  and South America (Peru) +
low to moderate elevations +
differentiated +
multicellular +
Not fruiting in the flora area. Exposed clay or sandy soil over calcareous rock, especially in cedar barrens or glades, dry bluffs, ledges +
yellow +  and orange-red or red +
bordered +  and 1-stratose +
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 +
incurved-contorted +
squarrose-recurved +
distally broadly channeled +  and tubulose +
reduced +
2 cm20 mm <br />0.02 m <br /> (?) +
1-2-twisted +
dentate +  and entire +
acute +, plane +  and undulate +
short-conic;short-rostrate +
photosynthetic +
compound +, simple +, hollow +  and solid +
1 +  and 4 +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
Smithsonian Misc. Collect. +
straight +
elongate +
2 +  and 1 +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
depauperate +
rounded-triangular +  and rounded-pentagonal +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Barbula sect. Pleurochaete +
Pleurochaete luteola +
Pleurochaete +
species +
ovoid;cylindric +
orange +  and yellow +
stemless +  and perigoniate +
proximally pale;dark-brown +
occasionally smaller than the perichaetiate +