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 ovate-lanceolate, 0.4–0.8 mm; laminal cell walls thick. Stoloniferous leaves broadly ovate or suborbicular. Seta red-brown, 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)


V28 569-distribution-map.gif

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


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


Lower Taxa

... more about "Pseudoleskeella arizonae"
John R. Spence +
(R. S. Williams) E. Lawton +
Pseudoleskea arizonae +
Ariz. +, Colo. +, N.Mex. +, Utah +  and Mexico (Durango). +
moderate to high elevations (1000-3500 m) +
Shaded calcareous rock, shaded tree bases, wood, soil over rock +
Capsules mature summer. +
Bull. Torrey Bot. Club +
Lescuraea arizonae +  and Leskeella arizonae +
Pseudoleskeella arizonae +
Pseudoleskeella +
species +