Brachytheciastrum fendleri

(Sullivant) Ochyra & Zarnowiec

Biodivers. Poland 3: 172. 2003.

Illustrated
Basionym: Leskea fendleri Sullivant Mem. Amer. Acad. Arts, n. s. 4: 169, plate 1. 1849
Synonyms: Brachythecium fendleri (Sullivant) A. Jaeger
Treatment appears in FNA Volume 28. Treatment on page 410. Mentioned on page 409, 416.

Plants small, in loose to dense tufts, light green to yellowish or brownish. Stems 3–5 cm, creeping, terete-foliate, julaceous, irregularly pinnate, branches to 5 mm, terete-foliate. Stem-leaves erect-appressed when dry, erect-spreading when moist, loosely imbricate, straight, ovate or ovatelanceolate, not or sometimes slightly plicate, 0.9–1.3 × 0.2–0.5 mm; margins recurved basally, serrulate almost throughout; apex gradually tapered to sometimes acuminate, acumen spreading; costa to 60–70% leaf length, terminal spine present; alar cells subquadrate, 9–15 × 9–12 µm, region small, of 6–8 × 4 or 5 cells, distinctly to moderately delimited; laminal cells linear, 40–60 × 4–6 µm; basal-cells to 8–10 µm wide, indistinctly delimited from more distal cells. Sexual condition synoicous. Seta reddish, 1–1.5 cm, smooth or slightly rough. Capsule erect to inclined, reddish, ovate-elongate to cylindric, to 1.5 mm; endostome basal membrane less than 1/4 endostome length, cilia short to reduced or occasionally as long as segments. Spores 10–14 µm.


Habitat: Rock, soil over rock outcrops
Elevation: high elevations (1600-2400 m)

Distribution

V28 634-distribution-map.gif

Alta., Ariz., Calif., Colo., Mont., Nev., N.Mex., S.Dak., Tex., Utah, Wyo., Mexico (Chihuahua), Mexico (Durango)

Discussion

Brachytheciastrum fendleri, when treated within Brachythecium, was synonymized with B. collinum by A. J. Grout (1928–1940, vol. 3), and in some checklists, for example, M. F. V. Corley et al. (1981); this resulted in a broad extension of the species range. However, B. fendleri is confined to the southern part of United States and northern Mexico, and was recently discovered in the Canadian Rockies of Alberta (R. T. Caners, pers. comm.). The often erect and ovate-elongate to cylindric capsules and the synoicous inflorescence are evident in most collections, allowing easy separation from B. collinum. Important comments on the differentiation of these species were provided by K. D. McFarland (1994). The branch leaves are more falcate and less plicate than the stem leaves.

Selected References

None.

Lower Taxa

None.

"long" is not a number."broad" is not a number.

Michael S. Ignatov +
(Sullivant) Ochyra & Zarnowiec +
synoicous +  and sexual +
8um +  and 10um +
short-decurrent +
rounded +  and narrowed +
rounded-cucullate +  and decurrent +
short to long +
Leskea fendleri +
terete-foliate +
usually straight;curved +
cucullate +
erect +  and inclined +
ovate-elongate;cylindric +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
specialized +
synoicous +, dioicous +, autoicous +, sexual +  and asexual +
subquadrate +
differentiated +
9um +  and 12um +
occasionally +, short +  and reduced +
3 (?) +  and 2 (?) +
discernible +
thick +  and thin +
autoicous +  and sexual +
Alta. +, Ariz. +, Calif. +, Colo. +, Mont. +, Nev. +, N.Mex. +, S.Dak. +, Tex. +, Utah +, Wyo. +, Mexico (Chihuahua) +  and Mexico (Durango) +
yellow-green +  and orange tinge +
high elevations (1600-2400 m) +
not adherent +
Rock, soil over rock outcrops +
4um (?) +  and 6um (?) +
pointed +
subentire +  and serrulate +
short-conic +
perfect +  and xerocastique +
hygrocastique +
Biodivers. Poland +
opaque +  and clear +
roughened +  and smooth +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Illustrated +
0.9mm;1.3mm +
erect-spreading +
ovatelanceolate +  and ovate +
0.2mm;0.5mm +
terete-foliate +
pinnate +  and julaceous +
erect +  and ascending +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Brachythecium fendleri +
Brachytheciastrum fendleri +
Brachytheciastrum +
species +
incrassate +
thick;thick +
light green +  and yellowish or brownish +