Pseudoleskeella arizonae

(R. S. Williams) E. Lawton

Bull. Torrey Bot. Club 84: 351. 1957.

Basionym: Pseudoleskea arizonae R. S. Williams Bryologist 33: 20, plate 3, figs. 1 – 10. 1930
Synonyms: Lescuraea arizonae (R. S. Williams) P. S. Wilson & D. H. Norris Leskeella arizonae (R. S. Williams) Flow ers
Treatment appears in FNA Volume 28. Treatment on page 363. Mentioned on page 353.

Plants green to yellow-green, older stems golden. Stems weakly appressed to substrate, branches curved to erect. Stem-leaves not catenulate when dry, not homomallous, ovate, gradually or abruptly narrowed to apex, concave, strongly and distinctly 2-plicate, 0.6–1.5 (–2) mm, 3: 1; base flaring, cordate; margins recurved to mid leaf or beyond on one or both sides, distinctly serrulate distally; apex short-acuminate to acuminate, often falcate; costa single, strong, reaching mid leaf to percurrent; medial laminal cells 2 (–3):1, walls firm, not incrassate. Branch leaves ovate to ovatelanceolate, 0.4–0.8 mm; laminal cell-walls thick. Stoloniferous leaves broadly ovate or suborbicular. Seta redbrown, 0.1–0.2 cm. Capsule inclined, subcylindric, asymmetric, 1–2 mm. Spores 10–16 µm.


Phenology: Capsules mature summer.
Habitat: Shaded calcareous rock, shaded tree bases, wood, soil over rock
Elevation: moderate to high elevations (1000-3500 m)

Distribution

V28 569-distribution-map.gif

Ariz., Colo., N.Mex., Utah, Mexico (Durango)

Discussion

Pseudoleskeella arizonae is somewhat anomalous in the genus, and has been moved among four different genera since its description. The species is very similar to a small Pseudoleskea, but differs in the lack of paraphyllia. However, there are collections of other species of Pseudoleskea that occasionally produce few if any paraphyllia. The leaves are also similar to those of Pseudoleskea. Molecular data are probably needed to determine its correct placement; it may represent a new genus.

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Pseudoleskeella arizonae"
John R. Spence +
(R. S. Williams) E. Lawton +
adherent +  and free +
cordate +  and flaring +
Pseudoleskea arizonae +
monopodial +  and branching +
ovate +  and ovatelanceolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
flagelliform +
cucullate +
asymmetric-curved +
long-exserted +
subcylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
quadrate;short-rectangular +
differentiated +
rudimentary +
specialized +
autoicous +, dioicous +  and sexual +
not sinuate +  and 2-fid +
Ariz. +, Colo. +, N.Mex. +, Utah +  and Mexico (Durango) +
moderate to high elevations (1000-3500 m) +
linear-lanceolate +  and lanceolate +
Shaded calcareous rock, shaded tree bases, wood, soil over rock +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
3 (?) +  and 1 (?) +
concave;narrowed;or;not ovate;concave;narrowed;or;not ovate;concave;narrowed;or;not ovate;concave;narrowed;or;not ovate;concave;narrowed;or;not ovate +
stoloniferous +
suborbicular +  and ovate +
dioicous +, sexual +  and asexual +
short-rostrate +  and conic +
branched +  and unbranched +
appressed +  and rarely recurved +
Capsules mature summer. +
stoloniferous +
peglike +  and linear +
Bull. Torrey Bot. Club +
curved +  and straight +
elongate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
asymmetric +  and symmetric +
not +  and catenulate +
erect-spreading;appressed;erect +
ovate +  and lanceolate +
slender +
differentiated +
Lescuraea arizonae +  and Leskeella arizonae +
Pseudoleskeella arizonae +
Pseudoleskeella +
species +
not incrassate +
thick +  and thin +
green +  and yellow-green +